Java学习笔记 —— 17

接口与集体的实现类之间存在多态性

public class TestInterface {public static void main(String[] args) {Duam d = new Duam();TestInterface.test1(d);TestInterface.test2(d);TestInterface.test3(d);}public static void test1(Runner r){ //Ruuner r = new Duam();r.run();}public static void test2(Swimmer s){//Swimmer s = new Duam();s.swim();}public static void test3(Flier f) {//Flier f = new Duam();f.fly();}}interface Runner {public abstract void run();}interface Swimmer {public abstract void swim();}interface Flier {public abstract void fly();}