Java error

**Kazkar** · 10-23-2012, 10:49 PM

I made a file using notepad. Saved x.java. CMD>File directory>javac x.java. Two files came to my desktop x.class and x$.class. I typed "java x" in right directory and this error came:

Java Code:

Exception in thread "main" java.lang.NoClassDefFoundError: guesscolor (wr
e: GuessColor)
at java.lang.ClassLoader.defineClass1(Nativ… Method)
at java.lang.ClassLoader.defineClass(Unknow… Source)
at java.security.SecureClassLoader.defineCl… Source)
at java.net.URLClassLoader.defineClass(Unkn… Source)
at java.net.URLClassLoader.access$100(Unkno… Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivile… Method)
at java.net.URLClassLoader.findClass(Unknow… Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadCla… Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoad… Source)

And when I type " java x.class " it gives me this:

Java Code:

Error: Could not find or load main class x.class

So my question is, how can I fix those errors and make it run properly?

**j2me64** · 10-23-2012, 10:55 PM

probably the signature of the main() is wrong. can you show how your main() is declared?

**Kazkar** · 10-23-2012, 10:57 PM

You mean that?

Java Code:

 public static void main(String[] args){
        x c = new x();
        c.start();
    }

**SJF** · 10-24-2012, 04:11 AM

A) x is a bad class name. Java classes should be leading cap, and longer than one letter.
B) guesscolor and GuessColor are not the same class. NoClassDefFoundError is your culprit.
C) until the program compiles, it will not run with java.exe. Get the compiler errors to go away first. You may want to try an IDE (Eclipse, NetBeans, etc.) which can help you identify missing classes/bad name prior to compile time.

**DarrylBurke** · 10-24-2012, 04:38 AM

Please go through the Forum Rules -- particularly the third paragraph.

db

**Kazkar** · 10-24-2012, 06:05 AM

I tried to hide the name lol. It's guesscolor class. So how can I fix the problem(s)?

**Kazkar** · 10-24-2012, 09:07 AM

Come on this is urgent :(

**Kazkar** · 10-24-2012, 03:57 PM

I'm sorry, I shouldn't bump this much but this is really urgent. It has to be done in 2 hours :( I tried my parents, teacher and yahoo ask but still nothing. Please if you got anything to ask or you know the answer or anything please just post :l

**DarrylBurke** · 10-24-2012, 05:33 PM

All about urgent questions

db

**Kazkar** · 10-24-2012, 05:50 PM

Originally Posted by DarrylBurke

All about urgent questions

db

Thnx, didn't help atall though. Luckily I got more time now. Its still urgent.

**DarrylBurke** · 10-24-2012, 07:16 PM

Originally Posted by Kazkar

Thnx ...

Didn't you learn anything from the page I linked?

db

**SJF** · 10-24-2012, 08:40 PM

Once again: guesscolor and GuessColor are NOT the same to the java compiler.

Using an IDE (Eclipse, NetBeans, etc.) will help you find these. Many IDEs for Java are free to download and use.