testcloneable.java

java的小程序

public class TestCloneable
{
  public static void main(String[] args)
  {
     CloneableCircle c1 = new CloneableCircle(5);
     CloneableCircle c2 = (CloneableCircle)c1.clone();
     System.out.println("After copying c1 to circl2");
     if (c1 == c2)
       System.out.println("c1 and c2 reference to the same object");
     else
       System.out.println("c1 and c2 don't point to the same object");
     if (c1.equals(c2))
       System.out.println("c1 and c2 have the same contents");
     else
       System.out.println("c1 and c2 don't have the same contents");
     c1.setRadius(10);
     c1.getCreator().setFirstname("Michael");
     c1.getCreator().setMi("Z");

     System.out.println("\nAfter modifying c1");
     System.out.println("c1 " + c1);
     System.out.println("c2 " + c2);
     System.out.println( );
     if (c1 instanceof Cloneable)
     {
       System.out.println("A CloneableCircle objec is cloneable");
     }
     else
     {
       System.out.println("A CloneableCircle objec is not cloneable");
     }
     Circle c = new Circle( );
     if (c instanceof Cloneable)
     {
       System.out.println("A Circle object is cloneable");
     }
     else
     {
       System.out.println("A Circle object is not cloneable");
     }
  }
}