JD3 vs JD2 - jTabbedPane bug?

Question

In a JD3 applet, after placing several infobus components on each of several jTabbedPane jPanels, the applet runs in neither the appletviewer nor when deployed. However, when the applet is run in the appletviewer, it can be seen if you select the "restart" item in the pull-down menu of the appletviewer.
When the components are placed on only the first of the jPanels, the applet does run correctly in the appletviewer and also when deployed. However, if after placing components on more than one JPanel, you remove the components from all but the first jPanel, the problem persists.
The problem described above does not exist in JD2.

Answer 1

The following problem applies to JD3 but not JD2, where things work correctly.
The code below produces an applet with three tabs. Each tab has one or more components on it. If you drag and drop (reposition) the components on the second or third tab, the applet can neither be seen in the appletviewer nor deployed. You can reposition the components programatically, but this is impractical for the case where a few hundred components are involved.
Is there a way to drag and drop components on these tabs without "breaking" the application?
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import oracle.jdeveloper.layout.*;
public class Applet1 extends JApplet {
boolean isStandalone = false;
JPanel jPanel1 = new JPanel();
JTabbedPane jTabbedPane1 = new JTabbedPane();
JPanel jPanel2 = new JPanel();
JPanel jPanel3 = new JPanel();
JPanel jPanel4 = new JPanel();
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JButton jButton3 = new JButton();
XYLayout xYLayout1 = new XYLayout();
JTextField jTextField1 = new JTextField();
JTextField jTextField2 = new JTextField();
//Get a parameter value
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def);
//Construct the applet
public Applet1() {
//Initialize the applet
public void init() {
try {
jbInit();
catch (Exception e) {
e.printStackTrace();
//Component initialization
private void jbInit() throws Exception {
this.setSize(400,300);
jPanel1.setLayout(null);
jTabbedPane1.setBounds(new Rectangle(49, 5, 303, 274));
jPanel4.setLayout(xYLayout1);
jPanel3.setLayout(xYLayout1);
jPanel2.setLayout(xYLayout1);
jButton1.setText("jButton1");
jButton2.setText("jButton2");
jButton3.setText("jButton3");
jTextField1.setText("jTextField1");
jTextField2.setText("jTextField2");
this.getContentPane().add(jPanel1, BorderLayout.CENTER);
jPanel1.add(jTabbedPane1, null);
jTabbedPane1.addTab("Pane 0", jPanel4);
jPanel4.add(jButton3,new XYConstraints(126, 57, -1, -1));
jPanel4.add(jTextField1, new XYConstraints(73, 143, 102, 23));
jTabbedPane1.addTab("Pane 1", jPanel3);
jPanel3.add(jButton1, new XYConstraints(126, 57, -1, -1));
jPanel3.add(jTextField2,new XYConstraints(59, 140, 90, 23));
jTabbedPane1.addTab("Pane 2", jPanel2);
jPanel2.add(jButton2, new XYConstraints(126, 57, -1, -1));
//Get Applet information
public String getAppletInfo() {
return "Applet Information";
//Get parameter info
public String[][] getParameterInfo() {
return null;
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