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\ No newline at end of file

src/com/java8/features/EmployeeUtils.java

@@ -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

@@ -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

+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));
+*/
+    }
+}