winderror.java

来自「翁剀JAVA语言那门课程的教案 很多人都看多他的视频教程可惜没有ppt的教案」· Java 代码 · 共 29 行

//: WindError.java
// Accidentally changing the interface

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("WindX.play(NoteX n)");
	}
}

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);
	}
}