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Commit f73fc4d0 authored by Ravinder Pannala's avatar Ravinder Pannala
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.idea/sonarlint/issuestore/0/3/032dc785d643246859605b6e83c564d887334fa7 0 → 100644
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java:S1192"`Define a constant instead of duplicating this literal "Limit the n elements from list" 4 times.(x
o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
M java:S106"9Replace this use of System.out or System.err by a logger.(x
N java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(򄀠
J
java:S1128"4Remove this unused import 'java.util.stream.Stream'.(
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(ڦ
v
java:S4276"[Refactor this code to use the more specialised Functional Interface 'UnaryOperator<String>'(ާ
J
java:S1611"/Remove the parentheses around the "s" parameter(ާ
n
java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(ާ
S java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106$"9Replace this use of System.out or System.err by a logger.(ކ
N java:S106'"9Replace this use of System.out or System.err by a logger.(
J
java:S1128 "4Remove this unused import 'java.util.stream.Stream'.(
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t java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
J
java:S1611 "/Remove the parentheses around the "s" parameter(Φ
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java:S1612 "@Replace this lambda with method reference 'String::toUpperCase'.(Φ
S java:S106 "9Replace this use of System.out or System.err by a logger.(ő
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java:S1611"/Remove the parentheses around the "a" parameter(
W
java:S1612"AReplace this lambda with method reference 'Math::decrementExact'.(
S java:S106"9Replace this use of System.out or System.err by a logger.(⪴
J
java:S1611"/Remove the parentheses around the "b" parameter(٭
Q
java:S1612"6Replace this lambda with method reference 'Math::abs'.(٭
N java:S106"9Replace this use of System.out or System.err by a logger.(
E
java:S1611"/Remove the parentheses around the "c" parameter(ݔ
W
java:S1612"AReplace this lambda with method reference 'Math::incrementExact'.(ݔ
S java:S106"9Replace this use of System.out or System.err by a logger.(ד
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
A
java:S2201"+The return value of "collect" must be used.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
J
java:S1128 "/Remove this unused import 'java.util.Optional'.(
S
java:S1128
"8Remove this unused import 'java.util.function.Consumer'.(̆
N
java:S1128 "8Remove this unused import 'java.util.function.Function'.(͞
P
java:S1128 ":Remove this unused import 'java.util.stream.DoubleStream'.(Щ
J
java:S1128"4Remove this unused import 'java.util.stream.Stream'.(
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java:S3655""7Call "Optional#isPresent()" before accessing the value.(80
T
java:S3655"7Call "Optional#isPresent()" before accessing the value.(ҝ80
T
java:S3655"7Call "Optional#isPresent()" before accessing the value.(80
Z java:S106"9Replace this use of System.out or System.err by a logger.(80
Z java:S106"9Replace this use of System.out or System.err by a logger.(ə80
U java:S106"9Replace this use of System.out or System.err by a logger.(䓂80
T java:S106"9Replace this use of System.out or System.err by a logger.( 80
T java:S106#"9Replace this use of System.out or System.err by a logger.(y80
U java:S106&"9Replace this use of System.out or System.err by a logger.(80
U java:S106*"9Replace this use of System.out or System.err by a logger.(͡80
U java:S106."9Replace this use of System.out or System.err by a logger.(80
U java:S1062"9Replace this use of System.out or System.err by a logger.(80
U java:S1066"9Replace this use of System.out or System.err by a logger.(80
J
java:S22019"-The return value of "findFirst" must be used.(혗80
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Q
java:S3655/"4Call "first.isPresent()" before accessing the value.(υ80
T
java:S3655)"7Call "Optional#isPresent()" before accessing the value.(80
T
java:S3655("7Call "Optional#isPresent()" before accessing the value.(80
Z java:S106 "9Replace this use of System.out or System.err by a logger.(80
Z java:S106"9Replace this use of System.out or System.err by a logger.(¨80
Z java:S106"9Replace this use of System.out or System.err by a logger.(80
U java:S106"9Replace this use of System.out or System.err by a logger.(׷80
Z java:S106"9Replace this use of System.out or System.err by a logger.(ڬ80
U java:S106%"9Replace this use of System.out or System.err by a logger.(80
U java:S106*"9Replace this use of System.out or System.err by a logger.(ӽ80
U java:S106/"9Replace this use of System.out or System.err by a logger.(υ80
U java:S1063"9Replace this use of System.out or System.err by a logger.(80
U java:S1067"9Replace this use of System.out or System.err by a logger.(򎶣8Ŗ0
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E
java:S1066"/Merge this if statement with the enclosing one.(Œ™¶Á
N
java:S1854 "8Remove this useless assignment to local variable "list".(ŠŒÖ
S java:S106 "9Replace this use of System.out or System.err by a logger.(ã¿¢Ôùÿÿÿÿ
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java:S1168"+Return an empty collection instead of null.(¥¹ï
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java:S1197"*Move the array designators [] to the type.(§žìe
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java:S1168"+Return an empty collection instead of null.(¥¹ï
S java:S106""9Replace this use of System.out or System.err by a logger.(ú“‹ºùÿÿÿÿ
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z
java:S1488'"_Immediately return this expression instead of assigning it to the temporary variable "collect".(á­úÇÿÿÿÿÿ
z
java:S1488,"_Immediately return this expression instead of assigning it to the temporary variable "matches".(ðŸÀ°ýÿÿÿÿ
t java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(ºËîÜùÿÿÿÿ
S
java:S1854"=Remove this useless assignment to local variable "employees".(•ñªþ
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java:S1481".Remove this unused "employees" local variable.(•ñªþ
V java:S125"<This block of commented-out lines of code should be removed.(’ÞÌëüÿÿÿÿ
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java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(»òðÌùÿÿÿÿ
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java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(ŽÇš¶ýÿÿÿÿ
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java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(Þ·æº
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java:S2153"Remove the boxing of "s1".(¬þšÕùÿÿÿÿ
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java:S2153"HRemove the boxing to "Double"; The argument is already of the same type.(¬þšÕùÿÿÿÿ
N java:S106"9Replace this use of System.out or System.err by a logger.(ÆÀûý
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java:S42762"]Refactor this code to use the more specialised Functional Interface 'BinaryOperator<Integer>'(éÑÊý
N java:S1063"9Replace this use of System.out or System.err by a logger.(¨×¶´
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java:S42765"]Refactor this code to use the more specialised Functional Interface 'BinaryOperator<Integer>'(ÜŽ¬ïÿÿÿÿÿ
N java:S1066"9Replace this use of System.out or System.err by a logger.(¥å©Š
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java:S42768"\Refactor this code to use the more specialised Functional Interface 'BinaryOperator<String>'(ßâü
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java:S16028"SRemove useless curly braces around statement and then remove useless return keyword(ßâü
N java:S106;"9Replace this use of System.out or System.err by a logger.(É߇€
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java:S4276="]Refactor this code to use the more specialised Functional Interface 'BinaryOperator<Integer>'(êÞ¦—
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java:S1602="SRemove useless curly braces around statement and then remove useless return keyword(êÞ¦—
S java:S106@"9Replace this use of System.out or System.err by a logger.(ëʺñùÿÿÿÿ
Z
java:S1068&"?Remove this unused "fetchEmployeesMatchingToKey" private field.(‹äÒâúÿÿÿÿ
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v
java:S1488 "`Immediately return this expression instead of assigning it to the temporary variable "contains".(ÍØĬ
o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(‚ïÎñ
W
java:S18546"<Remove this useless assignment to local variable "collect2".(˜Ç¼Úüÿÿÿÿ
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java:S1854*";Remove this useless assignment to local variable "collect".(‘ÙÞ–
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java:S1854"8Remove this useless assignment to local variable "test".(úÕô¢ýÿÿÿÿ
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java:S1854 "5Remove this useless assignment to local variable "p".(þ®æùÿÿÿÿÿ
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java:S1481 "&Remove this unused "p" local variable.(þ®æùÿÿÿÿÿ
D
java:S1481")Remove this unused "test" local variable.(úÕô¢ýÿÿÿÿ
h
java:S4276"RRefactor this code to use the more specialised Functional Interface 'IntPredicate'(ÿŒ‹ß
Q java:S125"<This block of commented-out lines of code should be removed.(å·ôµ
V java:S125"<This block of commented-out lines of code should be removed.(À‚½…úÿÿÿÿ
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java:S4276"RRefactor this code to use the more specialised Functional Interface 'IntPredicate'(Ü®¬
V java:S125"<This block of commented-out lines of code should be removed.( Ò¬õúÿÿÿÿ
N java:S106"9Replace this use of System.out or System.err by a logger.(²¯½©
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java:S1611"4Remove the parentheses around the "string" parameter(”©¼Õ
S java:S106$"9Replace this use of System.out or System.err by a logger.(¤ä¡õýÿÿÿÿ
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java:S1481*",Remove this unused "collect" local variable.(‘ÙÞ–
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java:S1612,"@Replace this lambda with method reference 'System.out::println'.(ßÃÝ»ÿÿÿÿÿ
S java:S106,"9Replace this use of System.out or System.err by a logger.(ßÃÝ»ÿÿÿÿÿ
N java:S1061"9Replace this use of System.out or System.err by a logger.(·Þø«
H
java:S14816"-Remove this unused "collect2" local variable.(˜Ç¼Úüÿÿÿÿ
J
java:S1128"4Remove this unused import 'java.util.stream.Stream'.(ó÷Ž”
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N java:S106"9Replace this use of System.out or System.err by a logger.(
P
java:S6397"5Replace this character class by the character itself.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
9
java:S1128"$Remove this unused import 'java.io'.(D
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<
java:S1700"Rename field "singletonEx"(80
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
N java:S106 "9Replace this use of System.out or System.err by a logger.(ժ
M java:S106"9Replace this use of System.out or System.err by a logger.(H
n
java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(
N java:S106"9Replace this use of System.out or System.err by a logger.(ۮ
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
N java:S106"9Replace this use of System.out or System.err by a logger.(ß
N java:S106""9Replace this use of System.out or System.err by a logger.(҈ś
N java:S106)"9Replace this use of System.out or System.err by a logger.(
N java:S106/"9Replace this use of System.out or System.err by a logger.(㢽
N
java:S1128"8Remove this unused import 'com.java8.features.Employee'.(
R
java:S1128"=Remove this unused import 'com.java8.features.EmployeeUtils'.(
S
java:S1128"=Remove this unused import 'com.java8.features.Utils.Student'.(
]
java:S1128"BRemove this unused import 'com.java8.features.Utils.StudentUtils'.(Ӽ
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f
java:S1192"IDefine a constant instead of duplicating this literal "Ravinder" 3 times.(80
v java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(80
Q
java:S1611 "4Remove the parentheses around the "string" parameter(80
I
java:S1602 ",Remove useless curly braces around statement(80
Z java:S106 "9Replace this use of System.out or System.err by a logger.(ٿ80
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java:S4276"QRefactor this code to use the more specialised Functional Interface 'IntConsumer'(п80
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java:S1611"/Remove the parentheses around the "i" parameter(п80
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java:S1602"SRemove useless curly braces around statement and then remove useless return keyword(п80
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java:S1611"4Remove the parentheses around the "string" parameter(80
U java:S106"9Replace this use of System.out or System.err by a logger.(80
U java:S106"9Replace this use of System.out or System.err by a logger.(80
Z java:S106"9Replace this use of System.out or System.err by a logger.(80
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java:S1612"@Replace this lambda with method reference 'System.out::println'.(Ӭ80
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U java:S106#"9Replace this use of System.out or System.err by a logger.(ǹ80
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java:S1611&"2Remove the parentheses around the "name" parameter(Ռ80
N
java:S1602&",Remove useless curly braces around statement(Ռ80
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U java:S106)"9Replace this use of System.out or System.err by a logger.(ì80
N
java:S1602+",Remove useless curly braces around statement(80
T java:S106,"9Replace this use of System.out or System.err by a logger.(í)80
Z java:S106."9Replace this use of System.out or System.err by a logger.(ؓ80
Q
java:S16110"/Remove the parentheses around the "a" parameter(ى80
N
java:S16020",Remove useless curly braces around statement(ى80
b
java:S16120"@Replace this lambda with method reference 'System.out::println'.(ى80
Z java:S1061"9Replace this use of System.out or System.err by a logger.(樤80
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java:S16116"/Remove the parentheses around the "b" parameter(ݱ80
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java:S16026",Remove useless curly braces around statement(ݱ80
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java:S16126"@Replace this lambda with method reference 'System.out::println'.(ݱ80
Z java:S1067"9Replace this use of System.out or System.err by a logger.(80
Q
java:S1611<"/Remove the parentheses around the "c" parameter(ż80
N
java:S1602<",Remove useless curly braces around statement(ż80
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java:S1612<"@Replace this lambda with method reference 'System.out::println'.(ż80
U java:S106="9Replace this use of System.out or System.err by a logger.(߇80
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
Q
java:S1854";Remove this useless assignment to local variable "collect".(
7
java:S3864"!Remove this use of "Stream.peek".(龕
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java:S3864"!Remove this use of "Stream.peek".(
S java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(龕
B
java:S1481",Remove this unused "collect" local variable.(
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e
java:S1192
"JDefine a constant instead of duplicating this literal "developer" 8 times.(Ÿì¥Èüÿÿÿÿ
P
java:S1118":Add a private constructor to hide the implicit public one.(¯¥¸å
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
M
java:S3655"7Call "Optional#isPresent()" before accessing the value.(
R
java:S3655""7Call "Optional#isPresent()" before accessing the value.(͡
M
java:S3655"7Call "Optional#isPresent()" before accessing the value.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106#"9Replace this use of System.out or System.err by a logger.(
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(•é¥ß
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J
java:S3740"/Provide the parametrized type for this generic.(
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java:S3740"/Provide the parametrized type for this generic.(
o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
p
java:S4276"URefactor this code to use the more specialised Functional Interface 'BooleanSupplier'(
l
java:S4276"QRefactor this code to use the more specialised Functional Interface 'IntSupplier'(
Y
java:S1612">Replace this lambda with method reference 'name::toLowerCase'.(
V
java:S1612";Replace this lambda with method reference 'ArrayList::new'.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106"9Replace this use of System.out or System.err by a logger.(׵
S java:S106"9Replace this use of System.out or System.err by a logger.(譇
S java:S106"9Replace this use of System.out or System.err by a logger.(˰
N java:S106"9Replace this use of System.out or System.err by a logger.(͂
N java:S106""9Replace this use of System.out or System.err by a logger.(
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
S java:S106"9Replace this use of System.out or System.err by a logger.(ؾ
N java:S106"9Replace this use of System.out or System.err by a logger.(ɟ
S java:S106"9Replace this use of System.out or System.err by a logger.(
M java:S106""9Replace this use of System.out or System.err by a logger.(
S java:S106%"9Replace this use of System.out or System.err by a logger.(
F
java:S1128"0Remove this unused import 'java.util.ArrayList'.(
S
java:S1128"8Remove this unused import 'java.util.function.Consumer'.(̆
J
java:S1128"4Remove this unused import 'java.util.stream.Stream'.(
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o java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
N java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106"9Replace this use of System.out or System.err by a logger.(
S java:S106"9Replace this use of System.out or System.err by a logger.(Ι
M java:S106("9Replace this use of System.out or System.err by a logger.(A
S java:S106."9Replace this use of System.out or System.err by a logger.(
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E
java:S1066""/Merge this if statement with the enclosing one.(
J
java:S1066#"/Merge this if statement with the enclosing one.(
h
java:S3776"RRefactor this method to reduce its Cognitive Complexity from 42 to the 15 allowed.(ǵ
S java:S106"9Replace this use of System.out or System.err by a logger.(ʓ
/
java:S2178"Correct this "&" to "&&".(߽
S java:S106("9Replace this use of System.out or System.err by a logger.(
S java:S1060"9Replace this use of System.out or System.err by a logger.(㿢
S java:S1066"9Replace this use of System.out or System.err by a logger.(
G
java:S1128"1Remove this unused import 'java.io.StringReader'.(֣
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java:S1128"0Remove this unused import 'java.nio.CharBuffer'.(
N
java:S1128"3Remove this unused import 'java.util.StringJoiner'.(
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java:S1128 "8Remove this unused import 'java.util.stream.Collectors'.(
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t java:S120"ZRename this package name to match the regular expression '^[a-z_]+(\.[a-z_][a-z0-9_]*)*$'.(
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java:S1192"GDefine a constant instead of duplicating this literal "Female" 3 times.(
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java:S1128"4Remove this unused import 'java.util.stream.Stream'.(
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</extension>
......@@ -89,12 +117,12 @@
<option name="Make" enabled="true" />
</method>
</configuration>
<configuration name="SortedEx2" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="com.java8.features.FunctionalInterfaces.streams.SortedEx2" />
<configuration name="OtherQuestions" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="com.java8.features.practice.OtherQuestions" />
<module name="Java8POC" />
<extension name="coverage">
<pattern>
<option name="PATTERN" value="com.java8.features.FunctionalInterfaces.streams.*" />
<option name="PATTERN" value="com.java8.features.practice.*" />
<option name="ENABLED" value="true" />
</pattern>
</extension>
......@@ -102,12 +130,12 @@
<option name="Make" enabled="true" />
</method>
</configuration>
<configuration name="SortedEx3" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="com.java8.features.FunctionalInterfaces.streams.SortedEx3" />
<configuration name="Test" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
<option name="MAIN_CLASS_NAME" value="com.java8.features.practice.Test" />
<module name="Java8POC" />
<extension name="coverage">
<pattern>
<option name="PATTERN" value="com.java8.features.FunctionalInterfaces.streams.*" />
<option name="PATTERN" value="com.java8.features.practice.*" />
<option name="ENABLED" value="true" />
</pattern>
</extension>
......@@ -117,11 +145,11 @@
</configuration>
<recent_temporary>
<list>
<item itemvalue="Application.GroupByEx" />
<item itemvalue="Application.Joining" />
<item itemvalue="Application.SortedEx3" />
<item itemvalue="Application.SortedEx2" />
<item itemvalue="Application.SortedEx" />
<item itemvalue="Application.Test" />
<item itemvalue="Application.OtherQuestions" />
<item itemvalue="Application.EmployeeExample" />
<item itemvalue="Application.OptionalEx" />
<item itemvalue="Application.AnyMatchEx" />
</list>
</recent_temporary>
</component>
......@@ -141,7 +169,14 @@
<option name="project" value="LOCAL" />
<updated>1678103647018</updated>
</task>
<option name="localTasksCounter" value="2" />
<task id="LOCAL-00002" summary="Second commit">
<created>1678677687009</created>
<option name="number" value="00002" />
<option name="presentableId" value="LOCAL-00002" />
<option name="project" value="LOCAL" />
<updated>1678677687009</updated>
</task>
<option name="localTasksCounter" value="3" />
<servers />
</component>
<component name="VcsManagerConfiguration">
......@@ -149,4 +184,30 @@
<MESSAGE value="Second commit" />
<option name="LAST_COMMIT_MESSAGE" value="Second commit" />
</component>
<component name="XDebuggerManager">
<breakpoint-manager>
<breakpoints>
<line-breakpoint enabled="true" type="java-line">
<url>file://$PROJECT_DIR$/src/com/java8/features/strings/ExcelSheet.java</url>
<line>35</line>
<option name="timeStamp" value="5" />
</line-breakpoint>
<line-breakpoint enabled="true" type="java-line">
<url>file://$PROJECT_DIR$/src/com/java8/features/strings/ExcelSheet.java</url>
<line>52</line>
<option name="timeStamp" value="6" />
</line-breakpoint>
<line-breakpoint enabled="true" type="java-line">
<url>file://$PROJECT_DIR$/src/com/java8/features/strings/ExcelSheet.java</url>
<line>53</line>
<option name="timeStamp" value="8" />
</line-breakpoint>
<line-breakpoint enabled="true" type="java-line">
<url>file://$PROJECT_DIR$/src/com/java8/features/strings/ExcelSheet.java</url>
<line>32</line>
<option name="timeStamp" value="10" />
</line-breakpoint>
</breakpoints>
</breakpoint-manager>
</component>
</project>
\ No newline at end of file
src/com/java8/features/EmployeeUtils.java
View file @ f73fc4d0
......@@ -20,13 +20,14 @@ public class EmployeeUtils {
public static List<Employee> fetchEmployee1() {
List<Employee> empList = new ArrayList<>();
empList.add(new Employee(3434, "Raghu", "developer", 10001.00, "BA"));
empList.add(new Employee(123, "ashoke", "manager", 10001.00, "DEV"));
empList.add(new Employee(424, "bharat", "lead", 10002.00, "QA"));
empList.add(new Employee(621, "chandu", "director", 10005.00, "BA"));
empList.add(new Employee(93, "danish", "developer", 10006.00, "DEV"));
empList.add(new Employee(448, "eenadu", "developer", 10001.00, "BA"));
empList.add(new Employee(432, "Ayaan", "developer", 10001.00, "BA"));
empList.add(new Employee(3434, "Raghu", "developer", 70000.00, "BA"));
empList.add(new Employee(123, "ashoke", "manager", 1000.00, "DEV"));
empList.add(new Employee(424, "bharat", "lead", 20000.00, "QA"));
empList.add(new Employee(621, "chandu", "director", 100000.00, "BA"));
empList.add(new Employee(93, "danish", "developer", 500000.00, "DEV"));
empList.add(new Employee(448, "eenadu", "developer", 2000.00, "BA"));
empList.add(new Employee(432, "Ayaan", "developer", 300000.00, "BA"));
empList.add(new Employee(426, "Bhargav", "Enginnerr", 2000000.00, "QA"));
return empList;
}
......
src/com/java8/features/FunctionalInterfaces/streams/ComparatorEx.java
View file @ f73fc4d0
......@@ -8,6 +8,7 @@ import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collector;
import java.util.stream.Collectors;
public class ComparatorEx {
......@@ -15,6 +16,8 @@ public class ComparatorEx {
List<Employee> employeeList = EmployeeUtils.fetchEmployee();
employeeList.stream().sorted(Comparator.comparing(Employee::getFirstName,Comparator.nullsFirst(Comparator.reverseOrder()))).collect(Collectors.toList());
Comparator<Employee> employeeComparator = Comparator.comparing(Employee::getFirstName);
Comparator<Employee> reversed = employeeComparator.reversed();
Comparator<Employee> employeeComparator1 = Comparator.comparingInt(Employee::getId);
......@@ -36,6 +39,11 @@ public class ComparatorEx {
//Sort By LastName and Id
employeeList.stream().sorted(employeeComparator5).forEach(System.out::println);
employeeList.stream()
.sorted(Comparator.comparing(Employee::getSalary)
.thenComparing(Employee::getFirstName,Comparator.nullsFirst(Comparator.reverseOrder())))
.collect(Collectors.toList());
//Sort By ID and Salary
employeeList.stream().sorted(employeeComparator6).forEach(System.out::println);
......@@ -52,6 +60,8 @@ public class ComparatorEx {
employeeList.stream()
.sorted(Comparator.comparing(Employee::getFirstName, Comparator.nullsLast(Comparator.reverseOrder())))
.forEach(System.out::println);
employeeList.stream().sorted(Comparator.comparing(Employee::getFirstName, Comparator.nullsLast(Comparator.reverseOrder())));
}
}
src/com/java8/features/FunctionalInterfaces/streams/Merge.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.FunctionalInterfaces.streams;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collector;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class Merge {
public static void main(String[] args) {
//Map-1
HashMap<String, Integer> subjectToStudentCountMap1 = new HashMap<>();
subjectToStudentCountMap1.put("Maths", 45);
subjectToStudentCountMap1.put("Physics", 57);
subjectToStudentCountMap1.put("Chemistry", 52);
subjectToStudentCountMap1.put("History", 41);
//Map-2
HashMap<String, Integer> subjectToStudentCountMap2 = new HashMap<>();
subjectToStudentCountMap2.put("Economics", 49);
subjectToStudentCountMap2.put("Maths", 42);
subjectToStudentCountMap2.put("Biology", 41);
subjectToStudentCountMap2.put("History", 55);
HashMap<String, Integer> subjectToStudentCountMap3 = new HashMap<>(subjectToStudentCountMap1);
subjectToStudentCountMap2.forEach((key, value) -> subjectToStudentCountMap3.merge(key, value, (v1, v2) -> v1 + v2));
System.out.println(subjectToStudentCountMap3);
HashMap<String, Integer> collect = Stream.of(subjectToStudentCountMap1, subjectToStudentCountMap2)
.flatMap(entry -> entry.entrySet().stream()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, Integer::sum, HashMap::new));
System.out.println(collect);
LinkedHashMap<String, Integer> collect1 = collect.entrySet().stream()
.sorted(Map.Entry.comparingByKey())
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
System.out.println(collect1);
collect.entrySet().stream().
sorted(Map.Entry.comparingByKey())
.collect(Collectors.toMap(Map.Entry::getKey,Map.Entry::getValue,(e1,e2)->e1,LinkedHashMap::new));
/* LinkedHashMap<String, Integer> collect2 = collect.entrySet().stream().sorted(Map.Entry.comparingByValue().reversed()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
*/
}
}
src/com/java8/features/LamdaExpressions/Function/BiFunctionEx.java
View file @ f73fc4d0
......@@ -4,8 +4,7 @@ import com.java8.features.Employee;
import com.java8.features.EmployeeUtils;
import java.util.List;
import java.util.function.BiFunction;
import java.util.function.BiPredicate;
import java.util.function.*;
import java.util.stream.Collectors;
public class BiFunctionEx {
......@@ -16,7 +15,22 @@ public class BiFunctionEx {
//List<Employee> matchedEmployees = fetchEmployeesMatchingToKey.apply("MOHAN", employees);
ToIntBiFunction<String, String> toIntBiFunction = (s1, s2) -> {
return Integer.parseInt(s1) + Integer.parseInt(s2);
};
ToDoubleBiFunction<Integer, Integer> toDoubleBiFunction = (s1, s2) -> {
return Double.valueOf(s1) + Double.valueOf(s2);
};
ToLongBiFunction<Double, Integer> toLongBiFunction = (s1, s2) -> {
return Double.valueOf(s1).longValue() + Long.valueOf(s2);
};
System.out.println(
toIntBiFunction.applyAsInt("1", "4") + "--->" +
toDoubleBiFunction.applyAsDouble(4, 5) + "---" +
toLongBiFunction.applyAsLong(20.0, 30));
}
......
src/com/java8/features/LamdaExpressions/Function/FunctionEx1.java
View file @ f73fc4d0
......@@ -7,19 +7,20 @@ import java.math.BigDecimal;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.IntFunction;
public class FunctionEx1 {
public static void main(String[] args) {
Function<Integer,String> function= (i)-> i+"ravi";
Function<Integer, String> function = (i) -> i + "ravi";
System.out.println(function.apply(2));
Function<Integer,Integer> integerFunction= (i)-> i*i;
Function<Integer, Integer> integerFunction = (i) -> i * i;
System.out.println(integerFunction.apply(5));
Function<String,String> function1= x->"First"+x;
Function<String,String> function2=x->"Second"+x;
Function<String, String> function1 = x -> "First" + x;
Function<String, String> function2 = x -> "Second" + x;
Function<String, String> stringFunction = function1.andThen(function2);
System.out.println(stringFunction.apply("Ravinder"));
......@@ -33,23 +34,32 @@ public class FunctionEx1 {
List<Employee> employees = EmployeeUtils.fetchEmployee();
Function<Employee,String> function3= (employee)->{
return employee.getFirstName()+employee.getLastName();
Function<Employee, String> function3 = (employee) -> {
return employee.getFirstName() + employee.getLastName();
};
Consumer<String> employeeConsumer=employee->System.out.println(employee);
Consumer<String> employeeConsumer = employee -> System.out.println(employee);
employees.stream().map(function3).forEach(employeeConsumer);
Function<Double, BigDecimal> decimalFunction= (salary)->{
Function<Double, BigDecimal> decimalFunction = (salary) -> {
return new BigDecimal(salary);
};
employees.stream().map(e->e.getSalary()).map(decimalFunction).forEach(System.out::println);
employees.stream().map(e -> e.getSalary()).map(decimalFunction).forEach(System.out::println);
Function<Employee,Employee> employeeFunction= (employee)->{
Function<Employee, Employee> employeeFunction = (employee) -> {
String fullName = new StringBuilder().append(employee.getFirstName()).append(employee.getLastName()).toString();
employee.setFirstName(fullName);
return employee;
};
Consumer<Employee> employeeConsumer1 = (e)->System.out.println(e);
Consumer<Employee> employeeConsumer1 = (e) -> System.out.println(e);
employees.stream().map(employeeFunction).forEach(employeeConsumer1);
Function<String, String> function4 = (s) -> s.substring(1);
Function<String, String> function5 = function4.andThen(s -> s.toUpperCase());
System.out.println(function5.apply("ravinder"));
IntFunction<Double> intFunction = a -> a / 2.0;
System.out.println(intFunction.apply(3));
}
}
src/com/java8/features/LamdaExpressions/SupplierEx.java
View file @ f73fc4d0
......@@ -2,6 +2,9 @@ package com.java8.features.LamdaExpressions;
import java.util.ArrayList;
import java.util.List;
import java.util.function.DoubleSupplier;
import java.util.function.IntSupplier;
import java.util.function.LongSupplier;
import java.util.function.Supplier;
public class SupplierEx {
......@@ -12,13 +15,22 @@ public class SupplierEx {
Supplier<Boolean> booleanSupplier = () -> name.length() > 4;
Supplier<Integer> integerSupplier = () -> name.indexOf('R');
Supplier<String> supplier = ( )-> name.toLowerCase();
Supplier<String> supplier = () -> name.toLowerCase();
Supplier<List> supplier1 = () ->new ArrayList();
Supplier<List> supplier1 = () -> new ArrayList();
System.out.println(booleanSupplier.get());
System.out.println(integerSupplier.get());
System.out.println(supplier.get());
System.out.println(supplier1.get());
Supplier<String> supplier2 = () -> name;
System.out.println(supplier2.get());
IntSupplier supplier3 = () -> 0;
DoubleSupplier supplier4 = () -> 0.0;
LongSupplier supplier5 = () -> 0L;
System.out.println(supplier3.getAsInt() + "-->" + supplier4.getAsDouble() + "-->" + supplier5.getAsLong());
}
}
src/com/java8/features/LamdaExpressions/UnaryOperator/BinaryOperEx.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.LamdaExpressions.UnaryOperator;
import java.util.function.BinaryOperator;
public class BinaryOperEx {
public static void main(String[] args) {
BinaryOperator<Integer> binaryOperator = BinaryOperator.maxBy((a, b) -> a.compareTo(b));
System.out.println(binaryOperator.apply(100, 200));
BinaryOperator<Integer> binaryOperator1 = BinaryOperator.minBy((a, b) -> a.compareTo(b));
System.out.println(binaryOperator1.apply(100, 200));
}
}
src/com/java8/features/LamdaExpressions/UnaryOperator/UnaryOperatorEx.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.LamdaExpressions.UnaryOperator;
import java.util.function.DoubleUnaryOperator;
import java.util.function.IntUnaryOperator;
import java.util.function.LongUnaryOperator;
import java.util.function.UnaryOperator;
public class UnaryOperatorEx {
public static void main(String[] args) {
UnaryOperator<String> unaryOperator = (s)->s.toUpperCase();
System.out.println(unaryOperator.apply("Ravi"));
IntUnaryOperator intUnaryOperator = (a)-> Math.decrementExact(a);
System.out.println(intUnaryOperator.applyAsInt(10));
DoubleUnaryOperator doubleUnaryOperator = (b)->Math.abs(b);
System.out.println(doubleUnaryOperator.applyAsDouble(20.00));
LongUnaryOperator longUnaryOperator = (c)->Math.incrementExact(c);
System.out.println(longUnaryOperator.applyAsLong(30L));
}
}
src/com/java8/features/LamdaExpressions/consumer/ConsumerEx1.java
View file @ f73fc4d0
......@@ -4,8 +4,7 @@ import com.java8.features.Employee;
import com.java8.features.EmployeeUtils;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.*;
public class ConsumerEx1 {
......@@ -14,6 +13,7 @@ public class ConsumerEx1 {
System.out.println("Hello");
};
Consumer<Integer> integerConsumer = (i) -> {
return;
};
......@@ -34,6 +34,34 @@ public class ConsumerEx1 {
BiConsumer<String,String> biConsumer = (s1,s2)->System.out.println(s1+" "+s2);
BiConsumer<String, String> biConsumer1 = biConsumer.andThen((s1, s2) -> System.out.println(s1.toLowerCase() + "" + s2.toUpperCase()));
biConsumer1.accept("Ravi","Pannala");
Consumer<String> consumer1 = (name)->{
System.out.println(name+ " --name of the value--");
};
consumer1.andThen(s->System.out.println(s.toUpperCase())).accept("Ravinder");
BiConsumer<String,String> biConsumer2 = (s1,s2)->{
System.out.println("Actual ---name"+ s1+"--SurName--"+s2);
};
biConsumer2.andThen((s1,s2)->System.out.println(s1.toUpperCase()+" "+s2.toUpperCase())).accept("Ravinder","Pannala");
IntConsumer intConsumer = (a)->{
System.out.println(a);
};
intConsumer.accept(10);
DoubleConsumer doubleConsumer = (b)->{
System.out.println(b);
};
doubleConsumer.accept(200);
LongConsumer longConsumer = (c)->{
System.out.println(c);
};
longConsumer.accept(20L);
}
}
src/com/java8/features/LamdaExpressions/predicate/BipredicateEx.java
View file @ f73fc4d0
......@@ -15,5 +15,12 @@ public class BipredicateEx {
BiPredicate<Integer,Integer> biPredicate2 = (i1,i2)->i1>20&& i2<20;
System.out.println(biPredicate2.test(30,10));
BiPredicate<String,Integer> biPredicate3 = (s,a)->{
return s.equals("Ravi") && a > 5;
};
BiPredicate<String, Integer> andPredicate = biPredicate3.or((s, a) -> s.endsWith("vi") && a >= 5);
System.out.println(andPredicate.test("Ravi",5));
}
}
src/com/java8/features/LamdaExpressions/predicate/Example1.java
View file @ f73fc4d0
......@@ -2,8 +2,7 @@ package com.java8.features.LamdaExpressions.predicate;
import java.util.Arrays;
import java.util.List;
import java.util.function.BiPredicate;
import java.util.function.Predicate;
import java.util.function.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
......@@ -28,26 +27,40 @@ public class Example1 {
Predicate<Integer> and = integerPredicate.or(i -> i.equals(0)).and(i -> i >= 0);
System.out.println(and.test(20));
Predicate<String> stringPredicate = (string)->{
List<String> list = Arrays.asList("Ravi","Ramu");
Predicate<String> stringPredicate = (string) -> {
List<String> list = Arrays.asList("Ravi", "Ramu");
boolean contains = list.contains(string);
return contains;
};
System.out.println(stringPredicate.test("Hello"));
Predicate<Integer> even = i->i%2==0;
Predicate<Integer> even = i -> i % 2 == 0;
Predicate<Integer> odd = even.negate();
List<Integer> integers = Arrays.asList(1,4,2,3,5,6,2,3);
List<Integer> integers = Arrays.asList(1, 4, 2, 3, 5, 6, 2, 3);
List<Integer> collect = integers.stream().filter(even).collect(Collectors.toList());
List<Integer> collect1 = integers.stream().filter(odd).collect(Collectors.toList());
collect1.forEach(c->System.out.println(c));
collect1.forEach(c -> System.out.println(c));
//BiPredicate
BiPredicate<Integer,String> biPredicate= (i,s)->i>3 && s.equals("Ravi");
BiPredicate<Integer, String> biPredicate = (i, s) -> i > 3 && s.equals("Ravi");
System.out.println(biPredicate.test(10,"Ravi"));
System.out.println(biPredicate.test(10, "Ravi"));
Predicate<Integer> evenPredicate = a -> a % 2 == 0;
List<Integer> integers1 = Arrays.asList(1, 4, 5, 6, 7, 8);
List<Integer> collect2 = integers1.stream().filter(evenPredicate).collect(Collectors.toList());
IntPredicate intPredicate = a -> a > 5;
intPredicate.test(10);
LongPredicate longPredicate = b -> b < 2;
longPredicate.or(b -> b <= 2).test(1);
DoublePredicate doublePredicate = c -> c > 3;
doublePredicate.negate().test(4);
}
}
src/com/java8/features/LamdaExpressions/predicate/Test.java deleted 100644 → 0
View file @ 859f5ca0
package com.java8.features.LamdaExpressions.predicate;
public class Test {
}
src/com/java8/features/Optional/OptionalEx.java
View file @ f73fc4d0
......@@ -11,33 +11,47 @@ public class OptionalEx {
Optional<Object> empty = Optional.empty();
//String name=null; Null Pointer Exception will get
String name="Ravi";
String name = "Ravi";
Optional<String> name1 = Optional.of(name);
System.out.println(name1.get());
String s= "Hello";
String s = "Hello";
Optional<String> s1 = Optional.ofNullable(s); //If s value available it will s value other wise it give Optional.empty
System.out.println(s1.get()); //If you get value if it is not present java.util.NoSuchElementException
String str1 = null;
String value = Optional.ofNullable(str1).orElse("Ravi");
System.out.println("If value is not present -->"+value);
System.out.println("If value is not present -->" + value);
Supplier<String> stringSupplier = ()->"Pannala"; // If value is not present then it will give supplier value
Supplier<String> stringSupplier = () -> "Pannala"; // If value is not present then it will give supplier value
String s2 = Optional.ofNullable(str1).orElseGet(stringSupplier);
System.out.println("If value is not present then it will give supplier value-->"+s2);
System.out.println("If value is not present then it will give supplier value-->" + s2);
//if value is not present then it will give supplier object
Supplier<NullPointerException> exceptionSupplier = ()-> new NullPointerException("Value is not resent");
String s3 = Optional.ofNullable(str1).orElseThrow(exceptionSupplier);
System.out.println("if value is not present then it will give supplier object-->"+s3);
// Supplier<NullPointerException> exceptionSupplier = () -> new NullPointerException("Value is not resent");
// String s3 = Optional.ofNullable(str1).orElseThrow(exceptionSupplier);
//System.out.println("if value is not present then it will give supplier object-->" + s3);
Optional<String> s4 = Optional.of(s);
if(s4.isPresent()){
System.out.println("Value present--->"+s4.get());
if (s4.isPresent()) {
System.out.println("Value present--->" + s4.get());
}
Optional<String> opt = Optional.ofNullable(null);
// we're dead
System.out.println("OrElse ---->"+opt.orElse(destroyTheWorld()));
// we're safe
System.out.println("OrElse Get----->"+opt.orElseGet(() -> destroyTheWorld()));
}
static String destroyTheWorld() {
// destroy the world logic
return "successfully destroyed the world";
}
}
src/com/java8/features/practice/EmployeeExample.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.practice;
import com.java8.features.Employee;
import com.java8.features.EmployeeUtils;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
public class EmployeeExample {
public static void main(String[] args) {
List<Employee> employees = EmployeeUtils.fetchEmployee1();
//sort the employees by sal in asc?
List<Employee> collect = employees.stream().sorted(Comparator.comparing(Employee::getSalary)).collect(Collectors.toList());
System.out.println(collect);
//sort the employees by sal in desc?
List<Employee> collect1 = employees.stream().sorted(Comparator.comparing(Employee::getSalary).reversed()).collect(Collectors.toList());
System.out.println(collect1);
//Maximum salary employee
Employee employee = employees.stream().max(Comparator.comparing(Employee::getSalary)).get();
System.out.println("Maximum salary employee--->" + employee);
//Minimum salary employee
Employee employee1 = employees.stream().min(Comparator.comparing(Employee::getSalary)).get();
System.out.println("Minimum salary employee--->" + employee1);
//Second Maximum salary employee
Employee secondMaximum = employees.stream().sorted(Comparator.comparing(Employee::getSalary).reversed()).skip(1).findFirst().get();
System.out.println("Second Maximum salary employee--->" + secondMaximum);
List<Employee> collect2 = employees.stream().sorted(Comparator.comparing(Employee::getSalary)).limit(2).skip(1).collect(Collectors.toList());
System.out.println("Second Minimum salary employee--->" + collect2);
//get the Employees by Department
Map<String, List<Employee>> collect3 = employees.stream().collect(Collectors.groupingBy(Employee::getDept));
System.out.println("Get the Employees by Department--->" + collect3);
//Get The Maximum salary of Employee in each department ?
Map<String, Optional<Employee>> collect4 = employees.stream().collect(Collectors.groupingBy(Employee::getDept, Collectors.maxBy(Comparator.comparing(Employee::getSalary))));
System.out.println("Get The Maximum salary of Employee in each department-->" + collect4);
//Get The Minimum salary of Employee in each department ?
Map<String, Optional<Employee>> collect5 = employees.stream().collect(Collectors.groupingBy(Employee::getDept, Collectors.minBy(Comparator.comparing(Employee::getSalary))));
System.out.println("Get The Minimum salary of Employee in each department-->" + collect5);
//Get the department and their employees count?
Map<String, Long> collect6 = employees.stream().collect(Collectors.groupingBy(Employee::getDept, Collectors.counting()));
System.out.println("Get the department and their employees count?-->" + collect6);
//Get Max Sa
employees.stream().sorted(Comparator.comparing(Employee::getSalary).reversed()).skip(1).findFirst();
}
}
src/com/java8/features/practice/OtherQuestions.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.practice;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import java.util.stream.Stream;
public class OtherQuestions {
public static void main(String[] args) {
//Duplicate Number From a List?
List<Integer> list = Arrays.asList(1, 2, 3, 4, 3, 1);
List<Integer> collect = list.stream()
.collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
.entrySet().stream().filter(m -> m.getValue() > 1).map(Map.Entry::getKey).collect(Collectors.toList());
System.out.println("Duplicate Numbers from list" + collect);
//Duplicate Number from List
Set<Integer> collect1 = list.stream().filter(m -> Collections.frequency(list, m) > 1).collect(Collectors.toSet());
System.out.println("Duplicate Numbers from list" + collect1);
list.stream().filter(m->Collections.frequency(list,m)>1).collect(Collectors.toList());
//How to remove duplicates from a collection list of integers
List<Integer> collect3 = list.stream().distinct().collect(Collectors.toList());
System.out.println("How to remove duplicates from a collection list of integers" + collect3);
//Occurrence of a Character from a String?
String s = "Ravinder";
Map<Character, Long> collect2 = s.chars()
.mapToObj(c -> (char) c)
.collect(Collectors.groupingBy(Function.identity(), Collectors.counting()));
System.out.println("Occurrence of a Character from a String" + collect2);
//Reverse a collections
List<Integer> reverseCollection = list.stream().sorted(Comparator.reverseOrder()).collect(Collectors.toList());
System.out.println("Reverse a collections" + reverseCollection);
List<Integer> integers = Arrays.asList(3,6,2,1,7,2);
Collections.reverse(integers);
System.out.println("Reverse a collections using" +integers);
/* //remove-all-occurrences-from-String
List<String> stringList = Arrays.asList("A","B","C","A","B");
List<String> collect4 = stringList.stream().filter(i -> !Objects.equals(i, stringList)).collect(Collectors.toList());
System.out.println("remove-all-occurrences-from-String" + collect4);*/
}
}
src/com/java8/features/practice/SingletonEx.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.practice;
public class SingletonEx {
private SingletonEx singletonEx;
private SingletonEx() {
}
public SingletonEx getInstance() {
if (singletonEx == null) {
singletonEx = new SingletonEx();
}
return singletonEx;
}
}
src/com/java8/features/practice/SortHashMap.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.practice;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.stream.Collectors;
import static java.util.Map.Entry.comparingByKey;
public class SortHashMap {
public static void main(String[] args) {
Map<String, String> map = new HashMap<>();
map.put("ravinder", "Pannala");
map.put("Lavanya", "Etykyla");
map.put("Madhu", "Katippelyy");
map.put("Ayaan", "Aleti");
map.put("Jithendhar", "Yenugu");
LinkedHashMap<String, String> collect = map.entrySet().stream().sorted(Map.Entry.comparingByKey()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
LinkedHashMap<String, String> collect1 = map.entrySet().stream().sorted(comparingByKey(Collections.reverseOrder())).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
LinkedHashMap<String, String> collect2 = map.entrySet().stream().sorted(Map.Entry.comparingByValue()).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
LinkedHashMap<String, String> collect3 = map.entrySet().stream().sorted(Collections.reverseOrder(Map.Entry.comparingByValue())).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e1, LinkedHashMap::new));
System.out.println("Sort By Keys--->" + collect);
System.out.println("Sort By Keys DESC--->" + collect1);
System.out.println("Sort By Values--->" + collect2);
System.out.println("Sort By Values DESC--->" + collect3);
}
}
src/com/java8/features/practice/Test.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.practice;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
public class Test {
public static void main(String[] args) {
List<Number> list = Arrays.asList(1, 33.2, 3, 4);
list.stream().map(s -> s + "").filter(a -> a.contains("3")).forEach(System.out::println);
//List of Even Numbers and Odd Numbers from List
List<Integer> integers = Arrays.asList(1, 4, 2, 5, 6, 3, 7, 8, 9);
List<Integer> even = integers.stream().filter(i -> i % 2 == 0).collect(Collectors.toList());
List<Integer> odd = integers.stream().filter(i -> i % 2 != 0).collect(Collectors.toList());
System.out.println(even + " even--->");
System.out.println(odd + "--->odd");
//Given a list of integers, find out all the numbers starting with 1 using Stream functions?
List<Integer> integers1 = Arrays.asList(1, 14, 2, 5, 6, 13, 7, 18, 91);
List<String> collect = integers1.stream().map(s -> s + "").filter(a -> a.startsWith("1")).collect(Collectors.toList());
System.out.println(collect + "--->Number start with 1");
// How to find duplicate elements in a given integers list in java using Stream functions?
List<Integer> integers2 = Arrays.asList(18, 13, 2, 5, 6, 13, 7, 18, 91);
List<Integer> collect1 = integers2.stream().collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
.entrySet().stream().filter(m -> m.getValue() > 1).map(Map.Entry::getKey).collect(Collectors.toList());
System.out.println(collect1 + "--->find duplicate elements in a given integers");
//How to find duplicate characters from String
String name="ravinder pannala";
List<Character> collect2 = name.chars().mapToObj(c -> (char) c).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
.entrySet().stream().filter(s -> s.getValue() > 1).map(Map.Entry::getKey).collect(Collectors.toList());
System.out.println(collect2 + "---> duplicate characters from String");
//Given a list of integers, find the maximum value element present in it using Stream functions?
Integer integer = integers2.stream().max(Comparator.comparing(a -> a)).get();
Integer integer1 = integers2.stream().max(Integer::compareTo).get();
System.out.println(integer + "---> find the maximum value element present in--->"+integer1);
//Given a String, find the first non-repeated character in it using Stream functions
Optional<Character> first = name.chars().mapToObj(ch -> (char) ch).collect(Collectors.groupingBy(Function.identity(), Collectors.counting()))
.entrySet().stream().filter(m -> m.getValue() == 1L).map(Map.Entry::getKey).findFirst();
System.out.println("find the first non-repeated character"+first.get());
//Given a list of integers, sort all the values present in it using Stream functions?
List<Integer> collect3 = integers2.stream().sorted(Comparator.comparing(a -> a)).collect(Collectors.toList());
System.out.println("sort all the values present in it using Stream functions"+collect3);
//Given a list of integers, sort all the values present reverse order in it using Stream functions?
List<Integer> collect4 = integers2.stream().sorted(Collections.reverseOrder()).collect(Collectors.toList());
System.out.println("sort all the values present reverse order in it using"+collect4);
}
}
src/com/java8/features/strings/AngramString.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.util.Arrays;
public class AngramString {
public static void main(String[] args) {
boolean b = anagramString("anagram", "margana");
if (b) {
System.out.println("anagram");
} else {
System.out.println("Not anagrams");
}
}
public static boolean anagramString(String input1, String input2) {
input1 = input1.replaceAll("\\s", "");
input2 = input2.replaceAll("\\s", "");
boolean test = true;
if (input1.length() != input2.length()) {
test = false;
} else {
char[] chars1 = input1.toLowerCase().toCharArray();
char[] chars2 = input2.toLowerCase().toCharArray();
Arrays.sort(chars1);
Arrays.sort(chars2);
test = Arrays.equals(chars1, chars2);
}
return test;
}
}
src/com/java8/features/strings/Example1.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class Example1 {
public static void main(String[] args) {
List<String> list = new ArrayList<>();
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
list = generate(s);
System.out.println(list);
}
public static List<String> generate(String input) {
if (input.isEmpty() && input.length() == 0) {
return null;
}
List<String> result = new ArrayList<>();
String cells[] = input.split(":");
if (cells.length != 2) {
return null;
}
String startcell = cells[0];
String endcell = cells[1];
if (!startcell.isEmpty() && startcell.length() > 1 && !endcell.isEmpty() && endcell.length() > 1) {
if (Character.isAlphabetic(startcell.charAt(0)) && Character.isAlphabetic(endcell.charAt(0))) {
char startcoloumn = Character.toUpperCase(startcell.charAt(0));
char endcoloumn = Character.toUpperCase(endcell.charAt(0));
int startrow = Integer.parseInt(startcell.substring(1));
int endrow = Integer.parseInt(endcell.substring(1));
for (char col = startcoloumn; col <= endcoloumn; col++) {
System.out.println(col);
for (int i = startrow; i <= endrow; i++) {
result.add(Character.toString(col) + i);
}
}
}
}
return result;
}
}
\ No newline at end of file
src/com/java8/features/strings/ExcelSheet.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.io.StringReader;
import java.nio.CharBuffer;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.StringJoiner;
import java.util.stream.Collectors;
public class ExcelSheet {
//A B
//D5:D5
//A2:B
//2A:B1
//empty
//2A:
//22:33
//d5:a2A
//A2:b12
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
if (s.isEmpty() && s.length() == 0) {
System.out.println("Please provide proper output");
} else {
String[] excelSheet = s.split(":");
if (excelSheet != null & excelSheet.length > 1) {
String sheet1 = excelSheet[0]; //--A1
String sheet2 = excelSheet[1]; //--B12
if ((!sheet1.isEmpty() && sheet1.length() > 1) && (!sheet2.isEmpty() && sheet2.length() > 1)) {
if (sheet1.matches(".*\\d.*") && sheet2.matches(".*\\d.*")) {
if (Character.isAlphabetic(sheet1.charAt(0)) && Character.isAlphabetic(sheet2.charAt(0))) {
int istart = Character.codePointAt(sheet1, 0);
int iend = Character.codePointAt(sheet2, 0);
int beginRowNumber = Integer.parseInt(sheet1.substring(1, sheet1.length()));
int endRowNumber = Integer.parseInt(sheet2.substring(1, sheet2.length()));
System.out.println("Jstart-->+" + beginRowNumber + "''''" + endRowNumber);
List<String> list = new ArrayList<>();
if (istart <= iend) {
for (int i = istart; i <= iend; i++) {
for (int j = beginRowNumber; j <= endRowNumber; j++) {
list.add(Character.toString((char) i) + j);
}
}
System.out.println(list);
}
}
}
}
} else {
System.out.println("Sheet doesn't contain number");
}
}
}
//A2,A3,A4,A5,A6
//B2,B3,B4,B5,B6
}
src/com/java8/features/strings/Palindrom.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.util.Scanner;
public class Palindrom {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String A = sc.next();
/* Enter your code here. Print output to STDOUT. */
boolean test = true;
for (int i = 0; i < A.length() / 2; i++) {
if (A.charAt(i) != A.charAt(A.length() - i - 1)) {
test = false;
break;
}
}
if (test) {
System.out.print("Yes");
} else {
System.out.print("No");
}
}
}
\ No newline at end of file
src/com/java8/features/strings/Solution.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
// Write your code here.
s = s.trim();
if (s.length() == 0) {
System.out.print(0);
} else {
String[] splitArray = s.split("[,[ ]+'?!._@]+");
System.out.println(splitArray.length);
for (String string : splitArray) {
System.out.println(string);
}
}
scan.close();
}
}
src/com/java8/features/strings/SplitString.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.util.Scanner;
public class SplitString {
/*
On the first line, print an integer, , denoting the number of tokens in string (they do not need to be unique).
Next, print each of the tokens on a new line in the same order as they appear in input string .
*/
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
String[] splitArray = s.trim().split("[, '?!._@]+");
System.out.println(splitArray.length);
for (String string : splitArray) {
System.out.println(string);
}
scan.close();
}
}
\ No newline at end of file
src/com/java8/features/strings/String1.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
import java.io.*;
import java.util.*;
public class String1 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String A = sc.next();
String B = sc.next();
/* Enter your code here. Print output to STDOUT. */
System.out.print(A.length() + B.length() + "\n");
if (A.compareTo(B) <= 0) {
System.out.print("No" + "\n");
} else if (A.compareTo(B) > 0) {
System.out.print("Yes" + "\n");
}
A = A.substring(0, 1).toUpperCase() + A.substring(1).toLowerCase();
B = B.substring(0, 1).toUpperCase() + B.substring(1).toLowerCase();
System.out.print(A + " " + B);
}
}
src/com/java8/features/strings/String2.java 0 → 100644
View file @ f73fc4d0
package com.java8.features.strings;
public class String2 {
public static void main(String[] args) {
// smallestAndLargestString("welcometojava", 3);
String s = "2A";String s1 = "B";
boolean matches = s.matches(".*\\d.*");
System.out.println("Matches--->"+matches);
boolean matches1 = s1.matches(".*\\d.*");
System.out.println("Matches1--->"+matches1);
}
public static void smallestAndLargestString(String intput, int value) {
String output = intput.substring(0, value);
String smallest = output;
String largest = output;
for (int i = value; i < intput.length(); i++) {
output = output.substring(1, value) + intput.charAt(i);
if (largest.compareTo(output) < 0) {
largest = output;
}
if (smallest.compareTo(output) > 0) {
smallest = output;
}
}
System.out.println(largest);
System.out.println(smallest);
}
}
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