Thread: How to Add JPanel to JFrame during run-time

Hi All,

Please find the below code, when i tried to add a panel to frame
during run-time, am unable display the panel in main frame.

how to add the panel during run-time.
please findout the issue in the below code

 
Panel class
 
import java.awt.ComponentOrientation;
import java.util.Locale;
 
public class PanelOne extends javax.swing.JPanel {
 
/**
* Creates new form PanelOne
*/
public PanelOne() {
initComponents();
}
 
public boolean initApp() {
 
applyComponentOrientation(ComponentOrientation.get Orientation(Locale.getDefault()));
setVisible(true);
return true;
}
 
private void initComponents() {
 
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
 
jPanel1.setBorder(new javax.swing.border.MatteBorder(null));
 
jLabel1.setText("PanelOne");
 
jTextField1.setText("jTextField1");
 
org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.lay out.GroupLayout.LEADING)
.add(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.add(jPanel1Layout.createParallelGroup(org.jdeskto p.layout.GroupLayout.LEADING)
.add(jLabel1)
.add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 119, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addContainerGap(165, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(org.jdesktop.lay out.GroupLayout.LEADING)
.add(jPanel1Layout.createSequentialGroup()
.add(22, 22, 22)
.add(jLabel1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.R ELATED)
.add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap(99, Short.MAX_VALUE))
);
 
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap(org.jdesktop.layout.GroupLayout.D EFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
.add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
.addContainerGap(org.jdesktop.layout.GroupLayout.D EFAULT_SIZE, Short.MAX_VALUE)
.add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addContainerGap(org.jdesktop.layout.GroupLayout.D EFAULT_SIZE, Short.MAX_VALUE))
);
}// </editor-fold> 
// Variables declaration - do not modify 
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
private javax.swing.JTextField jTextField1;
// End of variables declaration 
}
 
 
Main JFrame Class
 
 
import java.awt.BorderLayout;
import javax.swing.JFrame;
 
public class Frame extends javax.swing.JFrame {
 
private PanelOne one;
 
/**
* Creates new form JFrame
*/
public Frame() {
initComponents();
}
 
public void initFrame() {
 
one = new PanelOne(); 
 
if (one.initApp()) {
 
add(one, BorderLayout.CENTER);
setTitle("Main Frame");
pack();
setLocationRelativeTo(null);
setVisible(true);
 
}
 
}
 
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code"> 
private void initComponents() {
 
setDefaultCloseOperation(javax.swing.WindowConstan ts.EXIT_ON_CLOSE);
 
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
.add(0, 557, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.Gro upLayout.LEADING)
.add(0, 481, Short.MAX_VALUE)
);
 
pack();
}// </editor-fold> 
 
public static void main(String args[]) {
Frame f = new Frame();
f.initFrame();
}
 
 
/**
* @param args the command line arguments
*/
// Variables declaration - do not modify 
// End of variables declaration 
 
}

Moved to AWT/Swing forum.

I'm a beginner but...can solve your problem to create the new panel object `one' in Frame constructor instead in a separate method?