appletsound.java

Java 多媒体技术(附源码) Java 3D API JavaSound API 各种格式的多媒体数据文件 JBuilder开发环境

package appletsound;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/**
 * <p>Title: Java声音演示程序</p>
 * <p>Description: 应用Applet API 处理声音</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: 北京师范大学计算机系</p>
 * @author 孙一林
 * @version 1.0
 */

public class AppletSound extends Applet {
  boolean isStandalone = false;
  String splay;
  private AudioClip sound;
  Button button1 = new Button();
  Button button2 = new Button();
  Button button3 = new Button();
  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public AppletSound() {
  }
  //Initialize the applet
  public void init() {
    try {
      splay = this.getParameter("File", "spacemusic.au");
      sound = getAudioClip( getDocumentBase(), splay );
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    button1.setLabel("播放");
    button1.setBounds(new Rectangle(24, 35, 94, 41));
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    this.setLayout(null);
    button2.setBounds(new Rectangle(149, 35, 94, 41));
    button2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button2_actionPerformed(e);
      }
    });
    button2.setLabel("循环播放");
    button3.setBounds(new Rectangle(279, 38, 94, 41));
    button3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button3_actionPerformed(e);
      }
    });
    button3.setLabel("停止播放");
    this.add(button1, null);
    this.add(button2, null);
    this.add(button3, null);
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    String[][] pinfo =
      {
      {"File", "String", ""},
      };
    return pinfo;
  }

  void button1_actionPerformed(ActionEvent e) {
    sound.play();
  }

  void button2_actionPerformed(ActionEvent e) {
    sound.loop();
  }

  void button3_actionPerformed(ActionEvent e) {
    sound.stop();
  }

  //Main method
/*
  public static void main(String[] args) {
    AppletSound applet = new AppletSound();
    applet.isStandalone = true;
    Frame frame;
    frame = new Frame() {
      protected void processWindowEvent(WindowEvent e) {
        super.processWindowEvent(e);
        if (e.getID() == WindowEvent.WINDOW_CLOSING) {
          System.exit(0);
        }
      }
      public synchronized void setTitle(String title) {
        super.setTitle(title);
        enableEvents(AWTEvent.WINDOW_EVENT_MASK);
      }
    };
    frame.setTitle("Applet Frame");
    frame.add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
    frame.setSize(200,120);
    Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
    frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
    frame.setVisible(true);
  }
*/
}