package T092201;public class Instrument {    public void play()    {        System.out.println("弹奏乐器！");    }}package T092201;public class Wind extends Instrument{    public void play()    {        System.out.println("弹奏Wind!");    }    public void play2()    {        System.out.println("调用wind的play2");    }}package T092201;public class Brass extends Instrument {    //复写play方法    public void play()    {        System.out.println("弹奏brass!");    }    public void play2()    {        System.out.println("调用brass的play2！");    }}package T092201;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);    }}