/*******************************************
  * Program to demonstrate how Java handles
  * String objects are reused unless an 
  * explicit call to "new" is made.
 ******************************************/

import java.io.*;

public class TestString {
  public static void main(String[ ] args) {
    // creates a new String object s1 that contains "abc"
    String s1 = "abc",
    // points String object s2 to the above String
           s2 = s1,
    // points String object s3 to the above String
           s3 = "abc";
    if (s1 == s2) System.out.println("s1 == s2");
    if (s1 == s3) System.out.println("s1 == s3");
    // forces Java to create a new String object s4 that contains "abc"
    String s4 = new String("abc"),
    // points s5 to the above String
           s5 = s4,
    // forces Java to create a new String object s6 that contains "abc"
    // this is not the same object that was created for s4
           s6 = new String("abc");
    if (s4 == s5) System.out.println("s4 == s5");
    if (s4 == s6) System.out.println("s4 == s6");
    if (s4.equals(s6)) System.out.println("s4 equals s6"); 
  }
}