Java实现简易音乐播放列表教程

public class Song {
    private String title;
    private String artist;
    private String filePath;
public Song(String title, String artist, String filePath) {
    this.title = title;
    this.artist = artist;
    this.filePath = filePath;
}

// Getter方法
public String getTitle() { return title; }
public String getArtist() { return artist; }
public String getFilePath() { return filePath; }

@Override
public String toString() {
    return title + " - " + artist;
}
}

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class MusicPlaylist {
private List playlist;
private Scanner scanner;
public MusicPlaylist() {
    playlist = new ArrayList<>();
    scanner = new Scanner(System.in);
}

public void addSong(Song song) {
    playlist.add(song);
    System.out.println("已添加: " + song);
}

public void removeSong(String title) {
    boolean removed = playlist.removeIf(song -> song.getTitle().equalsIgnoreCase(title));
    if (removed) {
        System.out.println("已移除歌曲: " + title);
    } else {
        System.out.println("未找到歌曲: " + title);
    }
}

public void displayPlaylist() {
    if (playlist.isEmpty()) {
        System.out.println("播放列表为空。");
        return;
    }
    System.out.println("\n--- 播放列表 ---");
    for (int i = 0; i < playlist.size(); i++) {
        System.out.println((i+1) + ". " + playlist.get(i));
    }
}

public void playSong(int index) {
    if (index < 1 || index > playlist.size()) {
        System.out.println("无效的索引！");
        return;
    }
    Song song = playlist.get(index - 1);
    System.out.println("正在播放: " + song);

    // 这里可以调用外部程序播放音频
    try {
        Runtime.getRuntime().exec("cmd /c start " + song.getFilePath()); // Windows示例
    } catch (Exception e) {
        System.out.println("无法播放该文件: " + e.getMessage());
    }
}
}

    public void start() {
        while (true) {
            System.out.println("\n=== 音乐播放列表 ===");
            System.out.println("1. 添加歌曲");
            System.out.println("2. 删除歌曲");
            System.out.println("3. 显示列表");
            System.out.println("4. 播放歌曲");
            System.out.println("5. 退出");
            System.out.print("请选择操作: ");
        int choice = scanner.nextInt();
        scanner.nextLine(); // 消费换行符

        switch (choice) {
            case 1:
                addNewSong();
                break;
            case 2:
                System.out.print("输入要删除的歌曲标题: ");
                String titleToRemove = scanner.nextLine();
                removeSong(titleToRemove);
                break;
            case 3:
                displayPlaylist();
                break;
            case 4:
                displayPlaylist();
                System.out.print("输入要播放的歌曲编号: ");
                int index = scanner.nextInt();
                playSong(index);
                break;
            case 5:
                System.out.println("再见！");
                return;
            default:
                System.out.println("无效选择，请重试。");
        }
    }
}

private void addNewSong() {
    System.out.print("输入歌曲标题: ");
    String title = scanner.nextLine();
    System.out.print("输入歌手: ");
    String artist = scanner.nextLine();
    System.out.print("输入音频文件路径（如 C:\\music\\song.mp3）: ");
    String path = scanner.nextLine();
    addSong(new Song(title, artist, path));
}

public class Main {
    public static void main(String[] args) {
        MusicPlaylist player = new MusicPlaylist();
        player.start();
    }
}