1 public String toString() 2 { 3 return "CD [artist=" + artist + ", numofTracks=" + numofTracks + ", toString()=" + super.toString() + "]"; 4 }
1 public boolean equals(Object obj) 2 { 3 // TODO Auto-generated method stub 4 CD c = (CD)obj; 5 return artist.equals(c.artist); 6 }
1 package com.dome; 2 3 public class MP3 extends Iterm 4 { 5 6 private String artist; 7 8 public MP3(String title, int playingTime, boolean gotIt, String comment,String artist) 9 { 10 super(title, playingTime, gotIt, comment); 11 // TODO Auto-generated constructor stub 12 this.artist=artist; 13 } 14 15 16 17 @Override 18 protected void print() 19 { 20 // TODO Auto-generated method stub 21 System.out.print("MP3:"); 22 super.print(); 23 System.out.println(":"+artist); 24 } 25 26 27 28 public static void main(String[] args) 29 { 30 // TODO Auto-generated method stub 31 32 } 33 34 }
原文:https://www.cnblogs.com/quxiangjia/p/12271760.html