exception in thread 'main' java.lang.NoCla

Question

The following program is throwing error:

public class HelloWorld {
    public static void main(String args[]) {
        System.out.println("Hello World!"); 
    }
}

CLASSPATH C:\Program Files\Java\jdk1.6.0_18\bin\

Path C:\Program Files\Java\jdk1.6.0_18\bin\

JAVAHOME C:\Program Files\Java\jdk1.6.0_18\bin

Can you please tell me the root cause?

Answer 1

Had the same problem tried above solutions but none worked. I had to go through my java code only to find that the main function could not be recognised since there was no space btw it and (String) ie initial code:

public static void main(String[]args){

working code.

public static void main (String[]args){

Hope I helped someone.

Answer 2

Easy & Simple solution: I solved this problem (NetBeans) by exporting the original project into zip file, deleting the original project directory and importing the project back from the zip file.

Answer 3

The Problem here is the setting the environment and the running of the class file. a. To set the environment path run the following command: set path=C:\Program Files (x86)\Java\jdk1.7.0\bin b. run the program from the package like com.test.TestJavaClass

Command: java com.test.TestJavaClass

The general issue here is we run it either from inside the package like src/package/name. We should not include src, package name is enough.

Answer 4

If your package is helloworld you would go to parent dir of your package then run:

java helloworld.HelloWorld

Answer 5

I had this proplem I used maven. I just click maven projects ant then name

project-> plugins -> clean -> and button run.

Answer 6

The javadoc of NoClassDefFounError itself would be a good start (here), and then I'll suggest you clean and rebuild your project.