public class CloneEx2 {

  public static class MyClass implements Cloneable {
    String s;	// immutable String
    int ia[];	// array class object

    public MyClass (String s, int len) {
      this.s = s;
      ia = new int[len];
    }

    public Object clone() {
      MyClass dup;

      try {
        dup = (MyClass) super.clone();
        dup.ia = (int[]) ia.clone();
      }
      catch (CloneNotSupportedException e) {
        return null;
      }

      return dup;
    }
  }

  public static void main(String[] args) {
    MyClass orig, copy;

    orig = new MyClass("Grades", 50);
    copy = (MyClass) orig.clone();
  }
}