StringTests.java

public class StringTests {   
  public static void main(String[] args) {
      String  s1,s2,s3,s4,s5,s6;
    s1=new String("Hello");
    s2="Hello";
    s3=s1;
    s4="Hello";
    s5="World";
    s6=new String("World");
    System.out.println(s1==s2);//false
    System.out.println(s1==s3);//true
    System.out.println(s1==s4);//false
    System.out.println(s1==s5);//false
    System.out.println(s1==s6);//false
    System.out.println(s2==s3);//false
    System.out.println(s2==s4);//true
    System.out.println(s2==s5);//false
    System.out.println(s2==s6);//false
    System.out.println(s3==s4);//false
    System.out.println(s3==s5);//false
    System.out.println(s3==s6);//false
    System.out.println(s4==s5);//false
    System.out.println(s4==s6);//false
    System.out.println(s5==s6);//false
    }
}