winderror.java

java编程思想的部分实现

//:c07 :Winderror.java
class Notex
{
	public static final int MIDDLE_C=0,C_SHARP=1,C_FLAT=2;
}
class InstrumentX
{
	public void play(int NoteX)
	{
		System.out.println("InstrumentX.play()");
	}
}
class WindX extends InstrumentX
{
	public void play(NoteX n)
	{
		System.out.println("NoteX.play()");
	}
}
public class WindError
{
	public static void tune(InstrumentX i)
	{
		i.play(NoteX.MIDDLE_C);
	}
	public static void main(String[]args)
	{
		WindX flute=new WindX();
		tune(flute);
	}
}