parambannerapplet.java~11~

是用jbuilder实现的一些原代码程序

package applettest;

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

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

/*
<applet code="ParamBanner" width=300 height=50>
<param name=message value="Java 创造了动态网页!">
<param name=status value="此处为状态栏!">
</applet>
*/


public class ParamBannerApplet
    extends Applet
    implements Runnable {
  private boolean isStandalone = false;
  String message;
  String status;
  Thread t = null;
  int state;
  boolean stopFlag;
  //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 ParamBannerApplet() {
  }

  //Initialize the applet
  public void init() {
    setBackground(Color.cyan);
    setForeground(Color.red);
    try {
      message = this.getParameter("message", "Java 创造了动态网页!");
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    try {
      status = this.getParameter("status", "此处为状态栏!");
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    try {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  //Component initialization
  private void jbInit() throws Exception {
  }

  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }

  //Get parameter info
  public String[][] getParameterInfo() {
    String[][] pinfo = {
        {
        "message", "String", ""}
        , {
        "status", "String", ""}
        ,
    };
    return pinfo;
  }

  public void start() {
    message = getParameter("message");
    if (message == null) {
      message = "Message not found.";
    }
    message = " " + message;
    status = getParameter("status");
    if (status == null) {
      status = "此为状态信息！";

    }
    t = new Thread(this);
    stopFlag = false;
    t.start();
  }

  // Entry point for the thread that runs the banner.
  public void run() {
    char ch;
    // Display banner
    for (; ; ) {
      try {
        repaint();
        Thread.sleep(1000);
        ch = message.charAt(0);
        message = message.substring(1, message.length());
        message += ch;
        repaint();
        if (stopFlag) {
          break;
        }
      }
      catch (InterruptedException e) {}
    }
  }

  // Pause the banner.
  public void stop() {
    stopFlag = true;
    t = null;
  }

// Display the banner.
  public void paint(Graphics g) {
    g.setFont(new Font("Dialog", Font.PLAIN, 14));
    g.drawString(message, 50, 30);
    showStatus(status);
  }

}