string - Using "==" in Java

public class Test { 
 public
            static void main(String[] args) 
 { 
 String s1 =
            "HELLO";
 String s2 = "HELLO";



            System.out.println(s1 == s2); // true
 } 
}
            

But when I use
:

public class Test { 

            public static void main(String[] args) 

 { 
 String s1 =
            new String("HELLO");
 String s2 = new String("HELLO");


            System.out.println(s1 == s2); // false
 } 
}
            

Can anybody please
explain the difference here? Thankyou!