ClassNotFoundException

**oontvoo** · 05-12-2010, 04:26 AM

I was trying to embed my applet to a simple page.

XML Code:

<html> 
<body> 
<applet code="Test.class" width="700" height="750"> 
</applet> 
</body> 
</html>

My Test.class file is in the same directory as my html file. But when I run the html file, i got a bunch of errors:

Java Code:

Exception: java.lang.ClassNotFoundException: Test.class
load: class Test.class not found.
java.lang.ClassNotFoundException: Test.class
	at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: \\localhost\classes\Test\class.class (The network name cannot be found)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(Unknown Source)
	at java.io.FileInputStream.<init>(Unknown Source)
	at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
	at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	... 7 more
Exception: java.lang.ClassNotFoundException: Test.class

Could anyone please tell me how to fix this?
Thanks.

P.S: I'm new, VERY new to applet. Today's the first lesson of mine on Applet at school~!

**Tolls** · 05-12-2010, 12:07 PM

Isn't it simply "Test"?
I think "Test.class" will have it looking for the "class" Class in the "Test" package.

**paul pasciak** · 05-12-2010, 06:51 PM

You've probably already found the answer by now,
but here it is again:

Java Code:

<html> 
<body> 
<applet code="Test.java" width="700" height="750"> 
</applet> 
</body> 
</html>

**oontvoo** · 05-13-2010, 06:07 AM

Are you sure it's the ".java" file that I must put in the code = '...' part?

**Tolls** · 05-13-2010, 08:57 AM

This error:
java.io.FileNotFoundException: \\localhost\classes\Test\class.class (The network name cannot be found)

is your problem.

Have you tried without the .class? It's not the way it's supposed to be done, but that error implies it's the problem I mentioned above.

**Norm** · 05-13-2010, 04:28 PM

Following Tolls post:
Java thought that Test.class was a package path. Ie that Test was a folder and class was the name of the .class file in the Test folder.

Removing the .class should fix it.

**paul pasciak** · 05-13-2010, 10:51 PM

Here is how I know

<applet code="Test.java" width="700" height="750">

works.

When I read this thread, I went to one of my
folders of java projects that use very brief html
code to run those projects.

I found code that is practically exact to the
html code you wrote, except for dimensions
and the <applet.. > line. Simply stated, I
know empirically that
<applet code="Test.java" width="700" height="750">
works from the working examples in my folder.

(note: you must have your Test.class code in that
directory/folder to make it work, and you do not
need the Test.java source code in there at all.)

Why
code = "Test.java"
but not
code = "Test.class"?

I think it's because html can work with other languages.
You could have Visual Basic code to run,
therefore that html line would be:
<applet code="Test.vbasic" width="700" height="750">
or whatever extension they use to inform the html
interpreter/compiler that Visual Basic is embedded
within it. Still, the compiled code (Test.class) must
exist in that directory order to be executed.

**Norm** · 05-13-2010, 11:09 PM

Books are wonderful things and I have many myself. However I'd always chose working code over the written word. Authors do make typos.

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