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Embedding An Applet Problems


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#1 Code Fox   Members   -  Reputation: 1810

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Posted 26 June 2012 - 04:37 PM

** Edit: The problem was my Java plugin for Forefox was outdated. After updating, the applet works fine.

I keep getting errors when I attempt to open an embedded applet I made ( Firefox Browser )
Applet name is FirstApplet.class
Location www.jar

Here are the errors

java.lang.UnsupportedClassVersionError: FirstApplet : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.defineClassHelper(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.access$100(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.UnsupportedClassVersionError: FirstApplet : Unsupported major.minor version 51.0


Here is the java code:
[source lang="java"]//Reference the required Java librariesimport java.applet.Applet;import java.awt.*;//The applet codepublic class FirstApplet extends Applet {; public void paint(Graphics g) { //Draw a rectangle width=250, height=100 g.drawRect(0,0,250,100); //Set the color to blue g.setColor(Color.blue); //Write the message to the web page g.drawString("Look at me, I'm a Java Applet!",10,50); }}[/source]
Here is the HTML:
[source lang="plain"]<HTML><HEAD><TITLE>My First Java Applet</TITLE></HEAD><BODY>Test: <BR><BR><applet code=FirstApplet.class archive="www.jar" width=250 height=100> <param name=foo value="bar"> </applet></BODY></HTML> [/source]


What am I doing wrong ?

Edited by Shippou, 26 June 2012 - 04:57 PM.

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#2 CaptainKraft   Members   -  Reputation: 266

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Posted 26 June 2012 - 05:08 PM

All of that works just fine for me in Chrome.

I tried running it as an applet via Eclipse and via my Chrome browser using the jar file and also using just the .class file. It all worked fine for me.

P.S. What is that semicolon on line 7 for?

#3 Code Fox   Members   -  Reputation: 1810

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Posted 26 June 2012 - 06:26 PM

All of that works just fine for me in Chrome.

I tried running it as an applet via Eclipse and via my Chrome browser using the jar file and also using just the .class file. It all worked fine for me.

P.S. What is that semicolon on line 7 for?


I found the issue, as stated in the original post .... as far as the semi colon is concerned, that is just an artifact leftover from code changes.

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