I have installed Eclipse Indiog Service Release 2 and Java 1.7. I have created a simple HelloWorld program in Eclipse. However, when I am running app using Run As Java Application its generating error as below :

First Message :
Java Vertual Machine Launcher : An error has occurred.

Second Message :
Error : Could not find the main class.
Error : A JNI error has occurred, please check your installation and try again.


public class HelloWorld {

     * @param args
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        System.out.println("Hello World!!!");


Please assist me asap, I am trying to resolve this since two weeks. I have this same problem with Eclipse Juno.
I can run successfully this java programm in Eclipse Europa.

Thank you very much!!!

Have you uninstalled and reinstalled Eclipse?