Difference between equals method and equal operator in Java

This code snippet describes the difference between equals() and equal(==) operator in java.

String str1="Hello";
String str2="Hello";
String str3=new String("Hello") //Using constructor.
 
If(str1 == str2)
        System.out.println("Equal 1");
else
        System.out.println("Not Equal 1");
 
If(str1 == str3)
        System.out.println("Equal 2");
else
         System.out.println("I am constructed using constructor, hence not interned");

If( str1.equals(str3) )
        System.out.println("Equal 3");
else
        System.out.println("Not Equal 3");

Output of the Above Programs

Equal 1

Not Equal 2

Equal 3