实现如下类之间的继承关系,并编写Music类来测试这些类。
1 package aaa; 2 3 class Instrument { 4 public void play () { 5 System.out.println("弹奏乐器:"); 6 } 7 } 8 9 class Wind extends Instrument { 10 public void play () { 11 System.out.println("弹奏Wind"); 12 } 13 public void play2 (){ 14 System.out.println("调用wind的play2"); 15 } 16 17 } 18 19 class Brass extends Instrument { 20 public void play () { 21 System.out.println("弹奏Brass"); 22 } 23 public void play2 () { 24 System.out.println("调用brass的play2"); 25 } 26 27 } 28 29 30 31 public class Music { 32 public static void tune (Instrument i) { 33 i.play(); 34 } 35 36 public static void main(String[] args) { 37 Music mm = new Music(); 38 Instrument dd = new Instrument(); 39 Wind bb = new Wind(); 40 Brass cc = new Brass(); 41 tune (dd); 42 tune (bb); 43 tune (cc); 44 45 } 46 }