package clone.magic;
public class Main {
  public static void main(String[] argv) throws CloneNotSupportedException {
    B x = new B(42,27);
    System.out.println(x);
    System.out.println(new A(x));
    System.out.println(x.copy());
    System.out.println(x.clone());
  }
}

class A implements Cloneable {
  int i;
  public A(int i) { this.i = i; }

  // A copy constructor
  public A(A that) { this.i = that.i; }

  // A copy method
  public Object copy() { return new A(i); }

  // The clone method
  public Object clone() throws CloneNotSupportedException {
    return super.clone();
  }
  public String toString() { return "A("+i+")"; }
}

class B extends A {
  int j;
  public B(int i, int j) { super(i); this.j = j; }
  public String toString() { return "B("+i+","+j+")"; }
}