ClassNotFound exception when loading applet in Chrome
I'm having a hard time getting a Java applet to run in Chrome. The class loader can't find the class, even though the it works fine in Firefox, Opera and Safari.
Here's my test applet class (I even took out the package declaration to keep it simple):
import java.awt.Graphics;
import java.applet.Applet;
public class Test extends Applet
{
public void init() { repaint(); }
public void paint( Graphics g ) {
g.drawOval(10, 10, 30, 50);
g.drawLine(15, 30, 22, 32);
g.fillOval(28, 28, 7, 5);
g.drawArc(15, 20, 20, 35, 210, 120);
}
}
Here's the minimalistic test page:
<!doctype html>
<html><head>
<meta charset="utf-8"/>
<title>Test</title>
</head><body>
<p>
<object type="application/x-java-applet" width="50" height="70">
<param name="code" value="Test" />
Test failed.
</object>
</p>
</body></html>
Here's the stack trace:
java.lang.ClassNotFoundException: Test
at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:252)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Plugin2ClassLoader.java:250)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:180)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Plugin2ClassLoader.java:161)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:687)
at sun.plugin2.开发者_如何学运维applet.Plugin2Manager.createApplet(Plugin2Manager.java:3046)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1498)
at java.lang.Thread.run(Thread.java:680)
I've compiled the class with javac Test.java, and I put the .class file in the same folder as the .html file. Again, this runs fine in both Firefox, Safari and Opera, so why not in Chrome?
I've tried creating a jar and adding <param name="archive" value="Test.jar" />, but that didn't help.
Oh, and while I'm asking stuff: Is there an official spec listing the <param> parameters one can use with applets in <object> tags? It's not in the HTML5 spec, which makes sense, but Oracle seems to favor the old abandoned <applet> tag and I need to use strict HTML5.
Environment
MacBook Pro running OS X 10.7.1
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-383-11A511)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-383, mixed mode)
Google Chrome 13.0.782.220
To keep it simple for testing, change this:
<!doctype html>
<html><head>
<meta charset="utf-8"/>
<title>Test</title>
</head><body>
<p>
<object type="application/x-java-applet" width="50" height="70">
<param name="code" value="Test" />
Test failed.
</object>
</p>
</body></html>
To this:
<html>
<head>
<meta charset="utf-8"/>
<title>Test</title>
</head>
<body>
<p>
<applet code="Test" width="50" height="70">
Test failed.
</applet>
</p>
</body>
</html>
Update 1
Note that deployJava.js is the correct way to embed an applet these days. It writes an object or embed element as the browser needs it, and it aims to do it correctly.
Looks like it just doesn't see your applet.
- The archive parameter is mandatory The path to your jar has to be specified correctly.
- If you don't specify the path, the assumption is it's in the same directory as your testpage, and not a subdir.
And we also assume, that jar contains your Test.class :)
加载中,请稍侯......
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