My software hults when I call another application

Question

Greetings
I'm developing an application (Senior) that contains a menu item that should open a dialog box upon clicking.
and I have a separate application (selectDialog) that opens the desired dialog box.
so, i'm calling the application (selectDialog) using the following code:
sourceItems[0].addActionListener(
         new ActionListener() {  // anonymous inner class
           public void actionPerformed( ActionEvent event )
               new selectDialog();
)                             but the problem is : when I click the menu item, the application stops responding.
and what is strange, calling the application selectDialog from it's own main class, doesn't cause any problems
public static void main(String[] args) {
     new DemoSelectSourceDialog();
}can you help me please in finding a way to open that dialog from my menu Item?
Some guy in a chatting room said that JDK1.4.1 is the reason behind it. Is that true?

Answer 1

Thank you all for replying
afarmand:
I have tried this code:
Runtime.getRuntime().exec("DemoSelectSourceDialog");and i'm getting no errors upon compilation, but when I click the Menu Item in my program no action is
performed!
Here's the code of DemoSelectSourceDialog.java:
import java.awt.Image;
import com.asprise.util.jtwain.Source;
import com.asprise.util.jtwain.SourceManager;
public class DemoSelectSourceDialog extends JTwainDemoCode {
     public DemoSelectSourceDialog() {
          try {
               Source source = SourceManager.instance().selectSourceUI();
               if(source == null) {
                    error("No source has been selected!");
                    return;
               source.open();
               Image image = source.acquireImage();
               new ImageDisplayer("DemoSelectSourceDialog", image);
          }catch(Exception e) {
               exception(e);
          }finally{
               SourceManager.closeSourceManager();
     public static void main(String[] args) {
          new DemoSelectSourceDialog();
}Does the line:
Runtime.getRuntime().exec("DemoSelectSourceDialog");
executes the file DemoSelectSourceDialog.class, or it must be transferred to an exe file? and if so, how can we do that.