package bbb;class Instrument{ public void play(){ System.out.println("弹奏乐器");}}class Wind extends Instrument{ public Wind(){ } public void playnew(){ } public void play(){ System.out.println("弹奏wind!"); } public void play2(){ System.out.println("调用wind的play2"); }}class Brass extends Instrument{ public Brass(){ } public void playnew(){ } public void play(){ System.out.println("弹奏brass!"); } public void play2(){ System.out.println("调用brass的play2"); }} public class Music{ public static void tune(Instrument i){ i.play(); } public static void main(String args[]){ Wind w=new Wind(); Brass b=new Brass(); tune(w); tune(b); } }
结果：弹奏wind! 弹奏brass!
转载于:https://www.cnblogs.com/YShen0/p/10812149.html
