Java面向对象练习题继承之乐器

 

//Instrument类

package 乐器;

public class Instrument {

	public void play()
	{
		System.out.println("弹奏乐器");
	}

　　

//Wind类

package 乐器;

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");
	}
}

　　

//Brass类

package 乐器;

public class Brass extends Instrument {

	public void play()
	{
		System.out.println("弹奏Brass");
	}
	public void play2()
	{
		System.out.println("调用Brass的play2");
	}
}

　　

//Music类

package 乐器;

public class Music {

	public static void tune(Instrument i)
	{
		i.play();
	}
	public static void main(String[] args) {
		
		Wind a=new Wind();
		tune(a);
		a.play2();
		Brass b=new Brass();
		tune(b);
		b.play2();
	}
}

　　

运行结果