?? song.java
字號(hào):
package designpatterns.observer.aspectj;public class Song implements Playable{ private String name; public Song(String name) { super(); this.name = name; } public String getName() { return name; } public void play() { System.out.println("Playing song " + getName()); } public void showLyrics(){ System.out.println("Displaying lyrics for " + getName()); } public boolean equals(Object o){ Song other = (Song) o; return this.name.equals(other.name); } public int hashCode() { return name.hashCode(); } }
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