一个Java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：