class StringImmutability
{
  public static void main(String[] args)
    {
      String h1 = "Jimi Hendrix";
      String h2 = "Jimi";
      System.out.println(h1 == h2);
      System.out.println(h1.equals(h2));

      h2 = h2 + " Hendrix";
      System.out.println("h2 is now: " + h2);
      System.out.println(h1 == h2); // different locations in memory
      System.out.println(h1.equals(h2)); // equivalent characters
      
      h2 = "Jimi Hendrix"; // new String
      System.out.println(h1 == h2); // optimized use of memory stores two strings at one location
      System.out.println(h1.equals(h2));
    }
}