testinterface.java

来自「java程序设计源代码」· Java 代码 · 共 24 行

interface Runner { public void run();}

interface Swimmer {public void swim();}

abstract class Animal  {abstract public void eat();}  

class Person extends Animal implements Runner,Swimmer {
	public void run() { System.out.println("run"); }
	public void swim()  { System.out.println("swim"); }
	public void eat() { System.out.println("eat"); }
}

public class TestInterface{
	public static void main(String args[]){
		TestInterface t = new TestInterface();
		Person p = new Person();
		t.m1(p);
		t.m2(p);
		t.m3(p);
	}
	public void m1(Runner f) { f.run(); }
	public void  m2(Swimmer s) {s.swim();}
	public void  m3(Animal a) {a.eat();}
}