Java-继承,多态练习09-22-01
1.实现如下类之间的继承关系,并编写Music类来测试这些类。
父类:
package com.lianxi; public class Instrument { //属性 private String yueqi; public String getYueqi() { return yueqi; } public void setYueqi(String yueqi) { this.yueqi = yueqi; } //构造方法 public Instrument(String yueqi) { this.yueqi=yueqi; } public Instrument() { super(); } //成员方法 public void play() { System.out.println("弹奏乐器名称:"+yueqi); } }
package com.lianxi; public class Brass extends Instrument { //方法重写 public void play() { System.out.println("弹奏Brass"); } public void play2() { System.out.println("调用Barss的play2"); } }
package com.lianxi; public class Wind extends Instrument { //方法重写 public void play() { System.out.println("弹奏Wind"); } public void play2() { System.out.println("调用Wind的play2"); } }
测试:
package com.lianxi; public class Music { public static void main(String[] args) { Instrument ins=new Instrument(); tune(ins); Wind w=new Wind(); Brass b=new Brass(); w.play(); w.play2(); b.play(); b.play2(); } public static void tune(Instrument i) { i.setYueqi("吉他"); i.play(); System.out.println(i.getYueqi()); }
结果:
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