Singleton

eager Loading/src/singleton/com/Student.java

+package singleton.com;
+
+public class Student {
+    static Student st = new Student();
+    private Student(){
+        System.out.println("Simple Singleton Created ");
+    }
+    static Student getInstance(){
+        return st;
+    }
+
+}

eager Loading/src/singleton/com/Test.java

+package singleton.com;
+public class Test {
+    public static void main(String [] args){
+        Student s1 = Student.getInstance();
+        Student s2 = s1;
+        System.out.println(s1==s2);
+    }
+}

lazyloading/src/fetching/com/Eager.java

+package fetching.com;
+class Eager{
+    private static Eager obj=new Eager();//Early, instance will be created at load time
+    private Eager(){
+
+        System.out.println("Eager Singleton Instantiation");
+    }
+
+    public static Eager getEager(){
+        return obj;
+    }
+
+    public static void main(String [] args ){
+
+        Eager e1 = Eager.getEager();
+
+    }
+}

lazyloading/src/fetching/com/Lazy.java

+package fetching.com;
+
+public class Lazy{
+    private static Lazy l = null;
+
+    private Lazy()
+    {
+        System.out.println("Lazy Singleton being initialized");
+    }
+
+    public static Lazy getInstance()
+    {
+        if(l == null)
+         l = new Lazy();
+        return l;
+    }
+
+
+    public static void main(String [] args){
+
+        Lazy l1 = Lazy.getInstance();
+
+    }
+
+}
\ No newline at end of file

lazyloading/src/hashcode/com/Hashcode.java

+package hashcode.com;
+
+public class Hashcode {
+    public static void main(String [] args){
+        String a = "suresh";
+        String b ="suresh";
+
+        if(a.equals(b)){
+            System.out.println("a and b both variable are equals and their respective values are  : "  + " " + a.hashCode() +
+                    " And " +  b.hashCode() );
+        }
+
+        String c = "suresh";
+        String d = "kumar";
+
+        if(!c.equals(d)){
+
+            System.out.println("c and d both variable are un_equals and their respective values are  : "  + " " + c.hashCode() +
+                    " And " +  d.hashCode() );
+        }
+
+    }
+
+}