Hi I'm working with the netbeans and I create a jar file, but it not opened with the java. When I try to open it opened with the winRAR program. This is the MainClass code:

public class MainClass {
    public static void main(String arg[]){
    Ludec cal=new Ludec();
           cal.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
           cal.setSize( 314, 380 ); 
           cal.setLocation(600,150);
           cal.setVisible( true ); 
    }

}

It run in the cmd by this command: java -jar "C:\Users\Tofiq\Documents\NetBeansProjects\JavaApplication1\dist\JavaApplication1.jar" but not run by clicking and its error: