appletsound.java

来自「oraily的Swing hacks code」· Java 代码 · 共 94 行

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.net.*;
import java.io.File;

public class AppletSound extends Applet 
    implements ActionListener {

    JButton fileButton, loadButton, playButton, loopButton, stopButton;
    JLabel urlLabel;
    JTextField urlField;
    AudioClip clip;


    public AppletSound() {
        setLayout (new GridLayout (2,1));
        // first row layout
        JPanel topPanel = new JPanel();
        urlLabel = new JLabel ("URL:");
        topPanel.add (urlLabel);
        urlField = new JTextField (25);
        urlField.addActionListener (this);
        topPanel.add (urlField);
        loadButton = new JButton ("Load");
        loadButton.addActionListener (this);
        topPanel.add (loadButton);
        fileButton = new JButton ("File");
        fileButton.addActionListener (this);
        topPanel.add (fileButton);
        add (topPanel);

        // second row layout
        JPanel bottomPanel = new JPanel();
        playButton = new JButton ("Play");
        playButton.addActionListener (this);
        bottomPanel.add (playButton);
        stopButton = new JButton ("Stop");
        stopButton.addActionListener (this);
        bottomPanel.add (stopButton);
        loopButton = new JButton ("Loop");
        loopButton.addActionListener (this);
        bottomPanel.add (loopButton);
        add (bottomPanel);
    }

    public void stop() {
        clip.stop();
    }


    public void actionPerformed (ActionEvent e) {
        Object source = e.getSource();
        if (source == fileButton) {
            JFileChooser chooser = new JFileChooser();
            int pick = chooser.showOpenDialog(this);
            if (pick == JFileChooser.APPROVE_OPTION) {
                try {
                    File file = chooser.getSelectedFile();
                    urlField.setText (file.toURL().toString());
                } catch (MalformedURLException murle) {
                    murle.printStackTrace();
                }
            } 
        } else if (source == loadButton ) {
            try {
                System.out.println ("field: " + urlField.getText());
                URL clipURL = new URL (urlField.getText());
                System.out.println ("loading " + clipURL);
                clip = getAudioClip (clipURL);
                System.out.println ("got clip");
                } catch (MalformedURLException murle) {
                    murle.printStackTrace();
                }
        } else if (source == playButton ) {
            clip.play();
        } else if (source == stopButton ) {
            clip.stop();
        } else if (source == loopButton ) {
            clip.loop();
        }
    }


    public static void main (String args[]) {
        JFrame f = new JFrame ("Applet Sound");
        f.getContentPane().add (new AppletSound());
        f.pack();
        f.setVisible(true);
    }

}