Bookmarks
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
//applet.html
/*
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>We've moved!</title>
</head>
<body bgcolor="White">
<h1>We've moved!</h1>
<p>Please update your bookmarks. Our new address is:</P>
<applet code=Redir.class width=300 heighT=100 alt="http://www.java2s.com">
<param name="URL" value="http://www.java2s.com">
<b>http://www.java2s.com</b>
</applet>
<hr/>
<p>If you have a Java-enabled browser,
we'll try to take you there in a few seconds.</p>
</body>
</html>
*/
import java.applet.Applet;
import java.awt.Graphics;
import java.net.URL;
/**
* A simple redirection applet.
*
* @author Ian Darwin
*/
public class Redir extends Applet implements Runnable {
protected String urlString;
protected URL theNewURL;
protected final static int NSECONDS = 5;
protected Thread t;
public void init() {
try {
// Get the address from a PARAM...
urlString = getParameter("URL");
if (urlString == null) {
urlString = "MISSING URL";
throw new IllegalArgumentException(
"Redir requires a URL parameter in the HTML");
}
// Make up the URL object
theNewURL = new URL(urlString);
// debug...
// showStatus("URL = " + theNewURL);
} catch (Exception err) {
System.err.println("Error!\n" + err);
showStatus("Error, look in Java Console for details!");
}
}
public void start() {
if (theNewURL == null)
return;
t = new Thread(this);
t.start();
}
/** Print a little message to the user. */
public void paint(Graphics g) {
if (urlString != null)
g.drawString(urlString, 20, 50);
else
g.drawString("Initializing...", 20, 50);
}
/**
* If users moves off the page, set Thread t to null so we don't
* showDocument from within the middle of the new page!
*/
public void stop() {
t = null;
}
/**
* run, called by the Thread, does the work of sleeping for a fixed number
* of seconds then, if the user hasn't moved off the page, actually passing
* control to the new page.
*/
public void run() {
for (int i = NSECONDS; i >= 0; i--) {
try {
Thread.sleep(1000);
if (t == null)
return;
} catch (InterruptedException e) {
// so what?
}
if (t == null)
return;
showStatus(Integer.toString(i));
if (t == null)
return;
showStatus("Ignition!");
// "And then a miracle occurs..."
getAppletContext().showDocument(theNewURL);
}
}
}
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