if (getMainClassName().length() == 0)
if (getMainClass() == null)
	public boolean isMainClassValid(IRunnableContext context) {		if (getMainClassName().length() == 0)			return true;		try {				return JavaModelUtil.hasMainMethod(getMainClass());		} catch (JavaModelException e) {			JavaPlugin.log(e.getStatus());		}		return false;	}