Java小实例——音乐播放器

package KKMusic;


import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.BorderLayout;
import java.awt.EventQueue;


import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import java.awt.CardLayout;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.sound.sampled.FloatControl;
import javax.sound.sampled.SourceDataLine;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import java.awt.event.ItemListener;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.awt.event.ItemEvent;
import javax.swing.JMenu;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.JSlider;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseEvent;


public class Mp3 extends JFrame {


    private JPanel contentPane;
    File file;//声明文件对象
    String filename;
   
    JFileChooser chooser = new JFileChooser();//创建一个文件选择器
   
    private JTextField xiaoxi;
   
    boolean loop = false;
   
    AudioClip adc;//声音音频剪辑对象
   
    SourceDataLine line;
   
    private FloatControl volume = null;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Mp3 frame = new Mp3();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }


    /**
     * Create the frame.
     */
    public Mp3() {
        setTitle("\u97F3\u4E50\u64AD\u653E\u5668");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 265, 333);

        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);

        JMenu mnNewMenu = new JMenu("\u6587\u4EF6");
        menuBar.add(mnNewMenu);
        xiaoxi = new JTextField();
        xiaoxi.setColumns(10);
        xiaoxi.setText("欢迎使用本播放器");
        JMenuItem dakai = new JMenuItem("\u6253\u5F00");
        dakai.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int value = chooser.showOpenDialog(chooser);//接受文件选择器的状态
                if (value == chooser.APPROVE_OPTION) {
                    file = chooser.getSelectedFile();//返回选中文件
                    filename = file.getName();
                    String flag = filename;
                    xiaoxi.setText(flag);
                    try {
                        if (adc != null)
                            adc.stop();
                        URL url = new URL("file:" + file.getPath());//创建资源定位
                        adc = Applet.newAudioClip(url);
//adc.play();

                    } catch (MalformedURLException e1) {
// TODO Auto-generated catch block
                        e1.printStackTrace();
                        System.out.println("不能播放！");
                    }
                }
            }
        });
        mnNewMenu.add(dakai);

        JMenuItem tuichu = new JMenuItem("\u9000\u51FA");
        tuichu.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                dispose();
                if (adc != null)
                    adc.stop();
                return;
            }
        });

        mnNewMenu.add(tuichu);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);

        JButton playbtn = new JButton("\u64AD\u653E");
        playbtn.setHorizontalAlignment(SwingConstants.LEFT);
        playbtn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
 
                String flag = "正在播放：" + filename;
                if (adc == null) {
                    flag = "请选择播放的音乐";
                    xiaoxi.setText(flag);
                    return;
                }
                adc.play();
                xiaoxi.setText(flag);
            }
        });

        JButton stopbtn = new JButton("\u6682\u505C");
        stopbtn.setHorizontalAlignment(SwingConstants.LEFT);
        stopbtn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                adc.stop();
                String flag = "停止播放音乐:" + filename;
                xiaoxi.setText(flag);
            }
        });

        JButton againbtn = new JButton("\u5FAA\u73AF");
        againbtn.setHorizontalAlignment(SwingConstants.LEFT);
        againbtn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                loop = !loop;
                String flag = "";
                ;
                if (loop) {
                    adc.play();
                    adc.loop();//循环播放
                    flag = "循环播放:" + filename;
                }
              else{
             adc.play();
             flag = "顺序播放" + filename;
             }
           xiaoxi.setText(flag);
            }
        });


        GroupLayout gl_contentPane = new GroupLayout(contentPane);
        gl_contentPane.setHorizontalGroup(
                gl_contentPane.createParallelGroup(Alignment.LEADING)
                        .addGroup(gl_contentPane.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING, false)
                                        .addComponent(xiaoxi, Alignment.LEADING)
                                        .addGroup(Alignment.LEADING, gl_contentPane.createSequentialGroup()
                                                .addComponent(playbtn, GroupLayout.PREFERRED_SIZE, 64, GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(ComponentPlacement.UNRELATED)
                                                .addComponent(stopbtn, GroupLayout.PREFERRED_SIZE, 66, GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(ComponentPlacement.UNRELATED)
                                                .addComponent(againbtn, GroupLayout.PREFERRED_SIZE, 64, GroupLayout.PREFERRED_SIZE)))
                                .addContainerGap(15, Short.MAX_VALUE))
        );
        gl_contentPane.setVerticalGroup(
                gl_contentPane.createParallelGroup(Alignment.TRAILING)
                        .addGroup(gl_contentPane.createSequentialGroup()
                                .addComponent(xiaoxi, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(ComponentPlacement.UNRELATED)
                                .addPreferredGap(ComponentPlacement.RELATED, 173, Short.MAX_VALUE)
                                .addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
                                        .addComponent(playbtn)
                                        .addComponent(stopbtn)
                                        .addComponent(againbtn))
                                .addContainerGap())
        );
        contentPane.setLayout(gl_contentPane);
    }

}
           

运行结果如下：