noClassDefFoundError [SOLVED]

[gjon]

I get the following error when trying to run this class file. It seems to compile fine but I just can't get it to run.
Any help would be appreciated.


This is what the java source file contains:

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

Also tried:

 
import javax.swing.*;
  
public class HelloJava {
  public static void main( String[] args ) {
    JFrame frame = new JFrame( "Hello Java!" );
    JLabel label = new JLabel("Hello Java!", JLabel.CENTER );
    frame.getContentPane(  ).add( label );
    frame.setSize( 300, 300 );
    frame.setVisible( true );
  }
}