java question!!! plz help?

Question

what do i do if in java i am getting error like,


Exception in thread "main":java.lang.NoClassdefFoundError:MenuDemo

where MenuDemo is my classname of java program
i am able to compile this by javac stmt,bt while running it,it gives error,
classname is perfect
i am using java jdk1.5.0_11,
pls help me!!!!

Answer 1

Runtime Problems
Error Messages on Microsoft Windows Systems

Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldApp

If you receive this error, java cannot find your bytecode file, HelloWorldApp.class.

One of the places java tries to find your .class file is your current directory. So if your .class file is in C:\java, you should change your current directory to that. To change your directory, type the following command at the prompt and press Enter:

cd c:\java

The prompt should change to C:\java>. If you enter dir at the prompt, you should see your .java and .class files. Now enter java HelloWorldApp again.

If you still have problems, you might have to change your CLASSPATH variable. To see if this is necessary, try clobbering the classpath with the following command.

set CLASSPATH=

Now enter java HelloWorldApp again. If the program works now, you'll have to change your CLASSPATH variable. To set this variable, consult the Update the PATH variable section in the JDK 6 installation instructions. The CLASSPATH variable is set in the same manner.


Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorldApp/class
A common mistake made by beginner programmers is to try and run the java launcher on the .class file that was created by the compiler. For example, you'll get this error if you try to run your program with java HelloWorldApp.class instead of java HelloWorldApp. Remember, the argument is the name of the class that you want to use, not the filename.

Answer 2

i think the problem is that you are creating an applet and you need to put the CLASS file in a html. Search the actual procedure on google, but i think thats your problem.

Answer 3

Look at this link for the answer