1 public class Instrument {2 3 public void play(){4 System.out.println("弹奏乐器");5 }
1 public class Wind extends Instrument { 2 3 public void play(){ 4 System.out.println("弹奏Wind"); 5 } 6 7 public void play2(){ 8 System.out.println("调用Wind的play2"); 9 }10 11 }
1 public class Brass extends Instrument { 2 3 public void play(){ 4 System.out.println("弹奏Brass"); 5 } 6 public void play2(){ 7 System.out.println("调用Brass的play2"); 8 } 9 10 }
1 public class Music { 2 public static void tune (Instrument i){ 3 i.play(); 4 } 5 6 7 public static void main(String[] args) { 8 9 Wind w=new Wind();10 tune(w);11 Brass b=new Brass();12 tune(b);13 b.play2();14 15 16 }17 18 }
结果:
原标题:继承—Music
关键词: