Integer a=10;
Integer b=10;
Integer c=new Integer(10);
Integer d=new Integer(10);
System.out.println(a==b);
System.out.println(c==d);
System.out.println(a.equals(b));
System.out.println(c.equals(d));
System.out.println(a.equals(c));
Integer b=10;
Integer c=new Integer(10);
Integer d=new Integer(10);
System.out.println(a==b);
System.out.println(c==d);
System.out.println(a.equals(b));
System.out.println(c.equals(d));
System.out.println(a.equals(c));