我试图在“框架”窗口的背景中播放音频文件，但发现添加一个图片要复杂得多。
我找到了一个应该如何添加音乐的“教程”，它看起来相当简单，至少在所需的代码量方面。但是，我无法播放音频文件，它说了两件事...
1st-我试图播放复制到我的java项目中的音频文件，这告诉我找不到该文件或目录。
2-我给该方法提供了一个音频文件的路径，它告诉我...
could not get audio input stream from input file
请记住，我是一个新手，本教程并没有提供太多帮助，所以我不知道此播放方法实际上在做什么。我很想学习如何做到这一点，但是对于该项目，我所见过的一切都过于复杂，而且我没有时间投入，因为没有必要仅添加一点点技巧。
任何帮助是极大的赞赏!!我在有问题的代码周围加了星号。
public MultiForm() {
super("Multi Form Program");
setLayout(new FlowLayout());
menu = new JComboBox(fileName);
add(menu);
/*How to add a background image to the Menu.
* add(new JLabel(new ImageIcon(getClass().getResource("MatrixPIC.png"))));
*/
TheHandler handler = new TheHandler();
menu.addItemListener(handler);
}
public void matrixPanel() {
TheHandler handler = new TheHandler();
//Create a new window when "The Matrix" is clicked in the JCB
newFrame = new JFrame();
panel = new JPanel();
panel2 = new JPanel();
newFrame.setLayout(new FlowLayout());
newFrame.setSize(500, 300);
newFrame.setDefaultCloseOperation(newFrame.EXIT_ON_CLOSE);
matrixQuote = new JLabel("<html><center>After this, there is no turning back. "
+ "<br><center>You take the blue pill—the story ends, you wake up "
+ "<br><center>in your bed and believe whatever you want to believe."
+ "<br><center>You take the red pill—you stay in Wonderland, and I show"
+ "<br><center>you how deep the rabbit hole goes. "
+ "<br><center>Remember: all I'm offering is the truth. Nothing more.</html>");
panel.add(matrixQuote);
newFrame.add(panel, BorderLayout.NORTH);
//Blue pill button and picture.
Icon bp = new ImageIcon(getClass().getResource("Blue Pill.png"));
bluePill = new JButton("Blue Pill", bp);
panel2.add(bluePill);
bluePill.addActionListener(handler);
//Red pill button and picture
Icon rp = new ImageIcon(getClass().getResource("Red Pill.png"));
redPill = new JButton("Red Pill", rp);
panel2.add(redPill);
newFrame.add(panel2, BorderLayout.CENTER);
newFrame.setVisible(true);
}
*********************************************************************************
public void play(String path, int delay, int numberOfLoops) {
for(int i = 0; i < numberOfLoops; i++) {
new Thread() {
@Override
public void run() {
try {
File file = new File(path);
Clip clip = AudioSystem.getClip();
clip.open(AudioSystem.getAudioInputStream(file));
clip.start();
Thread.sleep(clip.getMicrosecondLength());
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}.start();
try {
Thread.sleep(delay);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
*********************************************************************************
private class TheHandler implements ItemListener, ActionListener{
public void itemStateChanged(ItemEvent IE) {
//listen for an item to be selected.
if(IE.getStateChange() == ItemEvent.SELECTED) {
Object selection = menu.getSelectedItem();
if("The Matrix".equals(selection)) {
matrixPanel();
}
else if("Another Option".equals(selection)) {
}
}
}
public void actionPerformed(ActionEvent AE) {
if(AE.getSource() == bluePill) {
//Clear panels after button is clicked.
newFrame.remove(panel);
newFrame.remove(panel2);
newFrame.repaint();
*********************************************************************************
play("/Users/SWD/Downloads/fail.mp3", 10, 30);
*********************************************************************************
newFrame.setSize(600, 400);
bpPanelLabel = new JPanel();
bpLabel = new JLabel("<html><center>WELCOME TO THE BEGINING OF YOUR NEW LIFE! " +
"<br><center>YOU'RE ABOUT TO SEE HOW DEEP THE RABBIT HOLE GOES!</html>");
newFrame.add(bpLabel);
newFrame.add(bpPanelLabel, BorderLayout.NORTH);
bpPanelPic = new JPanel();
newFrame.add(new JLabel(new ImageIcon(getClass().getResource("MatrixPIC.png"))));
newFrame.add(bpPanelPic, BorderLayout.CENTER);
newFrame.validate();
}
}
}
//Main method sets up the main JFrame with the menu
public static void main(String[] args) {
MultiForm go = new MultiForm();
go.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
go.setSize(400, 200);
go.setVisible(true);
}
}
最佳答案
Class#getResource或Class#getResourceAsStream代替Clip自动支持自身的循环，因此您不需要使用自己的循环，因为这可能会阻塞事件调度线程。 Thread似乎有点扼杀恕我直言，尽管您仍然可以使用它来添加人为延迟，但在我的示例中我使用了Swing Timer，因为它更简单:P 例如
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.JTextField;
import javax.swing.SpinnerNumberModel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.filechooser.FileFilter;
public class JavaApplication5 {
public static void main(String[] args) {
new JavaApplication5();
}
public JavaApplication5() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private Clip clip = null;
private JTextField audioFile;
private JButton browse;
private JSpinner loops;
private JSpinner delay;
private JFileChooser chooser;
public TestPane() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
add(new JLabel("Audio File:"), gbc);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1;
gbc.gridx++;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.anchor = GridBagConstraints.WEST;
audioFile = new JTextField(20);
add(audioFile);
gbc.gridwidth = 1;
gbc.weightx = 0;
gbc.gridx++;
browse = new JButton("...");
add(browse, gbc);
gbc.gridx = 0;
gbc.gridy++;
add(new JLabel("Loops: "), gbc);
loops = new JSpinner(new SpinnerNumberModel(1, 1, 100, 1));
gbc.gridx++;
gbc.fill = GridBagConstraints.NONE;
add(loops, gbc);
gbc.gridx = 0;
gbc.gridy++;
add(new JLabel("Delay (seconds): "), gbc);
delay = new JSpinner(new SpinnerNumberModel(0, 0, 10, 1));
gbc.gridx++;
gbc.fill = GridBagConstraints.NONE;
add(delay, gbc);
gbc.anchor = GridBagConstraints.CENTER;
gbc.gridx = 0;
gbc.gridy++;
gbc.gridwidth = GridBagConstraints.REMAINDER;
JButton play = new JButton("Play");
add(play, gbc);
play.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
play(
audioFile.getText(),
(int) delay.getValue(),
(int) loops.getValue());
} catch (LineUnavailableException | IOException | UnsupportedAudioFileException ex) {
ex.printStackTrace();;
JOptionPane.showMessageDialog(TestPane.this, "<html>Failed to play audio file:</br>" + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
});
browse.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (chooser == null) {
chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
chooser.setMultiSelectionEnabled(false);
chooser.addChoosableFileFilter(new FileFilter() {
@Override
public boolean accept(File f) {
System.out.println(f);
return f.getName().toLowerCase().endsWith(".wav");
}
@Override
public String getDescription() {
return "Wave Files (.wav)";
}
});
}
if (chooser.showOpenDialog(TestPane.this) == JFileChooser.APPROVE_OPTION) {
File selected = chooser.getSelectedFile();
audioFile.setText(selected.getPath());
}
}
});
}
public void play(String path, int delay, int numberOfLoops) throws LineUnavailableException, IOException, UnsupportedAudioFileException {
if (clip != null) {
clip.stop();
clip = null;
}
if (delay > 0) {
System.out.println("Start with delay");
Timer timer = new Timer(delay * 1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
try {
play(path, numberOfLoops);
} catch (UnsupportedAudioFileException | LineUnavailableException | IOException ex) {
ex.printStackTrace();;
JOptionPane.showMessageDialog(TestPane.this, "<html>Failed to play audio file:</br>" + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
});
timer.setRepeats(false);
timer.start();
} else {
play(path, numberOfLoops);
}
}
private void play(String path, int numberOfLoops) throws UnsupportedAudioFileException, LineUnavailableException, IOException {
File file = new File(path);
if (file.exists()) {
clip = AudioSystem.getClip();
clip.open(AudioSystem.getAudioInputStream(file));
clip.start();
}
}
}
}
关于java - 在JFrame窗口的背景中播放音乐，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32791646/