Error message when trying to run programs

[PerfectReign]

I am just starting out with Eclipse and the Window Builder application. So far, it appears to be very much what I needed. (Java's layout managers are subpar, imo, and I cannot believe they've been around since '96 with no GUI designer.)

Anyway on a test app, or any app, I get the following message when running:

Designer internal error: lava.lang.NullPointerException%0ALog Included: Yes%0A%0Ajava.lang.NullPointerException at com.swtdesigner.model.swing.JavaBeanInfo.createEventProperty(JavaBeanInfo.java:1474) at com.swtdesigner.model.swing.JavaBeanInfo.getPropertyList...

It goes on for about twenty more pages. I wish I could copy/paste it but it comes up in a modal dialog box with no copy ability.

I am using WindowBuilder Pro 4.1.1, compiled on 2005.07.27 for Eclipse 3.10.

I'm running SuSE 9.3 with Java 1.5.0_04.

Ideas?

Here's my code:

Code: Select all

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.TabItem;

public class main {

   protected Shell shell;

   public static void main(String[] args) {
      try {
         main window = new main();
         window.open();
      } catch (Exception e) {
         e.printStackTrace();
      }
   }

   public void open() {
      final Display display = Display.getDefault();
      createContents();
      shell.open();
      shell.layout();
      while (!shell.isDisposed()) {
         if (!display.readAndDispatch())
            display.sleep();
      }
   }

   protected void createContents() {
      shell = new Shell();
      shell.setSize(800, 600);
      shell.setText("Kai's Test Panel");


   }

}


[Eric Clayberg]

Anyway on a test app, or any app, I get the following message when running

Do you mean when running or when editing? The exception you listed would be a design time exception; not a runtime exception.

It goes on for about twenty more pages. I wish I could copy/paste it but it comes up in a modal dialog box with no copy ability.

You can copy any exception text from the Eclipse ".log" file.

I am using WindowBuilder Pro 4.1.1, compiled on 2005.07.27 for Eclipse 3.10.

That is a very old v4.1.1 build. I would suggest trying it with the latest v4.1.1 build.

[PerfectReign]

Thanks for the tips. Will upgrade to latest build. The runtime error occurs after selecting "Run" from Eclipse. I haven't yet figured out how to make a stand alone app.

[Eric Clayberg]

The runtime error occurs after selecting "Run" from Eclipse.

OK. The one exception that you posted is a design time exception that should not occur at runtime. If you encounter any runtime exceptions, you should post those here.