public interface Animal{ public abstract void cry(); }
public class Tiger implements Animal{ public void cry(){ System.out.println("I am a tiger"); } }
public class Bear implements Animal{ public void cry(){ System.out.println("I am a bear"); } }
ublic class Example02{ public static void main(String args[]){ Animal a; a=new Tiger(); a.cry(); } }
结果输出 I am a tiger
