Re: A nested class and the fields of her enclosing class

Mark Space wrote:


Here's my example I wrote from your code. Mine works. Does it give you
any clues?

package fubar;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JButton;
import javax.swing.JFrame;

public class EdtTest extends JFrame {
     JButton viewButtion = new JButton("click me");
     EdtTest() {
         add( viewButtion );
         setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
         pack();
         setSize(200, 200);
         setLocationRelativeTo(null);
     }
     public static void main(String[] args) {
         Hashtable h = new Hashtable();
         h.put("red", "fish");
         h.put("blue", "fish");
         new Upload().startUpload(h);
     }

     public JButton getViewButtion() {
         return viewButtion;
     }

}

class Upload {

     private Hashtable<String, Long> filesTable;
     private JButton button;

     protected void startUpload(Hashtable<String, Long> myFilesTable ) {

         this.filesTable = myFilesTable;
         if (!filesTable.isEmpty()) {
             System.out.println("is not Empty");
         }
         startNewWindow(); //opens the GUI
         button.addActionListener(new MyActionListener());

     }

     void startNewWindow(){
         try {
             javax.swing.SwingUtilities.invokeAndWait(new Runnable() {

                 public void run() {
                     createAndShowGui();
                 }
             });
         } catch (InterruptedException ex) {
             Logger.getLogger(Upload.class.getName()).log(Level.SEVERE,
null, ex);
             ex.printStackTrace();
         } catch (InvocationTargetException ex) {
             Logger.getLogger(Upload.class.getName()).log(Level.SEVERE,
null, ex);
             ex.printStackTrace();
         }
     }

     private void createAndShowGui() {
         EdtTest edtTest = new EdtTest();
         button = edtTest.getViewButtion();
         edtTest.setVisible(true);
     }

// start nested class
     public class MyActionListener implements ActionListener {

         public void actionPerformed(ActionEvent arg0) {
             if (filesTable.isEmpty()) {
                 System.out.println("is Empty");
             } else {
                 System.out.println("files = " + filesTable );
             }
         }
     }; //end nested class
}