instrument.java

来自「thinking in java 书中源码 第四版」· Java 代码 · 共 11 行

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

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