LinuxQuestions.org - Exception in thread "main" java.lang.NoClassDefFoundError:

Here is my code.

Code:

import java.io.*;

class Ex13{

    public static void main(String args[]) throws IOException{

        BufferedReader keyboard = new BufferedReader (new InputStreamReader(System.in));

      

        String input;

        int num = 0;

        int sum = 0;

      

        do {

        System.out.print("Enter a positive number: ");

        input = keyboard.readLine();

        num = Integer.parseInt(input);

      

        if ( num > 0)

            sum += num;

          

        }while (num > 0);

    System.out.println(sum);

    }

}

Compiling with javac hh.java was fine but somehow i got this error while run as java hh

Code:

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

  at gnu.j

ava.lang.MainThread.run(MainThread.java:102)

Caused by: java.lang.ClassNotFoundException: hh not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:./], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}

  at java.net.URLClassLoader.findClass(URLClassLoader.java:529)

  at gnu.gcj.runtime.SystemClassLoader.findClass(natSystemClassLoader.cc:27)

  at java.lang.ClassLoader.loadClass(ClassLoader.java:442)

  at java.lang.ClassLoader.loadClass(ClassLoader.java:377)

  at gnu.java.lang.MainThread.run(MainThread.java:98)

Hmmmm.. what went wrong? How do i fix it??