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?