java为什么提示缺少main函数

来源：百度知道 编辑：UC知道 时间：2024/05/08 09:41:57
//: polymorphism/music/Note.java
// Notes to play on musical instruments.
package polymorphism.music;

public enum Note {
MIDDLE_C, C_SHARP, B_FLAT; // Etc.
} ///:~

//: polymorphism/music/Instrument.java
package polymorphism.music;
import static net.mindview.util.Print.*;

class Instrument {
public void play(Note n) {
print("Instrument.play()");
}
}
///:~

//: polymorphism/music/Wind.java
package polymorphism.music;

// Wind objects are instruments
// because they have the same interface:
public class Wind extends Instrument {
// Redefine interface method:
public void play(Note n) {
System.out.println("Wind.play() " + n);
}
} ///:~

//: polymorphism/music/Music.java
// Inheritance & upcasting.
package polymorphism.music;

public class Music {
public static void tu

运行。。

Music.class 文件

没有错 我这里能运行 结果 windplay +地址
实在不行你把Note有关的全删掉

你能不能吧那些注释都给删了看着眼花啊