Ok i made a chat thing for a forum i have but it didn't work but there was a detail box and this came up on it.
"Java Plug-in 10.9.2.05
Using JRE version 1.7.0_09-b05 Java HotSpot(TM) Client VM

User home directory = C:\Users\Patricia

c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------"

Am i not able to use that chat? what does this mean? Can i do anything to be able to use the chat? Just...what?

That looks like the normal contents of a browser's java console that is displayed when the browser uses the java plugin. It does not show that there are any problems.

"It says like error" tells us nothing; it's not even English. If you have a compiler or runtime error message post the complete message plus the actual code it refers to.

"Error. click for details" So i click and a window box comes up with this
"ClassNotFoundAcception" And below that it says "Client.class"
Below all that in that window is another details button and there it just shows this.
"Java Plug-in 10.9.2.05
Using JRE version 1.7.0_09-b05 Java HotSpot(TM) Client VM

User home directory = C:\Users\Patricia

c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------"

... post the complete message plus the actual code it refers to.

Client.class is not a class name. It looks like a filename.
Can you view the HTML you have loaded and post it?
Some browsers do not like filename where there should be a class name.

Can you copy the html that is loaded and post it here?

Some browsers want the class name on the code= attribute of the <applet tag, not the filename.
For you it could be: code=Client

What browser are you using? Have you tried it in another browser?

Heres the HTML

<script type="text/javascript">/*<![CDATA[*/
   var addonchat = {
      signed:true, server:12, id:583951, width:"600",
      height:"425", language:"en" }
   var addonchat_param = { iconsize: 0 } /* ]]> */</script>
   <script type="text/javascript"
   src="http://client12.addonchat.com/chat.js"></script><noscript>
   To enter this chat room, please enable JavaScript in your web
   browser. This <a href="http://www.addonchat.com/">Chat
   Software</a> requires Java: <a href="http://www.java.com/">Get
   Java Now</a>
</noscript>

I'm using firefox and no i havent tried using a different browser

Try another browser.
Contact the authors of the program. The problem looks like its with the HTML and the browser, not with java.

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