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POSwitching between internal frames
 

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  1. POSwitching between internal frames
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    <p>I'm trying to develop a simple project. I need to change the contents of the panel defined inside a <code>JInternalFrame</code>. The code is as follows:</p> <p><code>JFrame_main</code>:</p> <pre><code>public class JFrame_main extends javax.swing.JFrame { /** * Creates new form JFrame_main */ public JFrame_main() { initComponents(); } /** * 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") // &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt; private void initComponents() { basepanel = new javax.swing.JPanel(); lbl_name = new javax.swing.JLabel(); bt_clear = new javax.swing.JButton(); lbl_title = new javax.swing.JLabel(); txt_name = new javax.swing.JTextField(); txt_cardno = new javax.swing.JTextField(); lbl_cardno = new javax.swing.JLabel(); lbl_accesscode = new javax.swing.JLabel(); txt_accesscode = new javax.swing.JPasswordField(); bt_ok = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setPreferredSize(new java.awt.Dimension(839, 480)); basepanel.setPreferredSize(new java.awt.Dimension(839, 480)); lbl_name.setFont(new java.awt.Font("Tahoma", 0, 20)); // NOI18N lbl_name.setText("NAME"); bt_clear.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N bt_clear.setText("CLEAR"); bt_clear.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { bt_clearActionPerformed(evt); } }); lbl_title.setFont(new java.awt.Font("Times New Roman", 1, 30)); // NOI18N lbl_title.setHorizontalAlignment(javax.swing.SwingConstants.CENTER); lbl_title.setText("AUTOMATED GOVERNMENT RATION SHOP"); txt_name.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N txt_cardno.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N lbl_cardno.setFont(new java.awt.Font("Tahoma", 0, 20)); // NOI18N lbl_cardno.setText("CARD NO."); lbl_accesscode.setFont(new java.awt.Font("Tahoma", 0, 20)); // NOI18N lbl_accesscode.setText("ACCESS CODE"); txt_accesscode.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N txt_accesscode.setMinimumSize(new java.awt.Dimension(6, 26)); bt_ok.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N bt_ok.setText("OK"); bt_ok.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { bt_okActionPerformed(evt); } }); javax.swing.GroupLayout basepanelLayout = new javax.swing.GroupLayout(basepanel); basepanel.setLayout(basepanelLayout); basepanelLayout.setHorizontalGroup( basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(basepanelLayout.createSequentialGroup() .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(basepanelLayout.createSequentialGroup() .addGap(96, 96, 96) .addComponent(lbl_title)) .addGroup(basepanelLayout.createSequentialGroup() .addGap(226, 226, 226) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false) .addGroup(javax.swing.GroupLayout.Alignment.LEADING, basepanelLayout.createSequentialGroup() .addGap(15, 15, 15) .addComponent(bt_ok, javax.swing.GroupLayout.PREFERRED_SIZE, 120, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(79, 79, 79) .addComponent(bt_clear, javax.swing.GroupLayout.PREFERRED_SIZE, 120, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(basepanelLayout.createSequentialGroup() .addComponent(lbl_name) .addGap(101, 101, 101) .addComponent(txt_name, javax.swing.GroupLayout.PREFERRED_SIZE, 208, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(basepanelLayout.createSequentialGroup() .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(lbl_cardno) .addComponent(lbl_accesscode)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(txt_accesscode, javax.swing.GroupLayout.PREFERRED_SIZE, 208, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(txt_cardno, javax.swing.GroupLayout.PREFERRED_SIZE, 208, javax.swing.GroupLayout.PREFERRED_SIZE)))))) .addContainerGap(99, Short.MAX_VALUE)) ); basepanelLayout.setVerticalGroup( basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(basepanelLayout.createSequentialGroup() .addGap(77, 77, 77) .addComponent(lbl_title) .addGap(61, 61, 61) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(basepanelLayout.createSequentialGroup() .addGap(2, 2, 2) .addComponent(lbl_name)) .addComponent(txt_name, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(txt_cardno, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(lbl_cardno, javax.swing.GroupLayout.Alignment.TRAILING)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(txt_accesscode, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(lbl_accesscode)) .addGap(53, 53, 53) .addGroup(basepanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(bt_ok) .addComponent(bt_clear)) .addGap(0, 126, Short.MAX_VALUE)) ); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(basepanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(basepanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)) ); pack(); }// &lt;/editor-fold&gt; private void bt_clearActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: txt_name.setText(""); txt_cardno.setText(""); txt_accesscode.setText(""); } private void bt_okActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: if (authen()) { JPanel_menu menu = new JPanel_menu(); changepanel(menu); } } /** * @param args the command line arguments */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //&lt;editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "&gt; /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(JFrame_main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(JFrame_main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(JFrame_main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(JFrame_main.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //&lt;/editor-fold&gt; /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new JFrame_main().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JPanel basepanel; private javax.swing.JButton bt_clear; private javax.swing.JButton bt_ok; private javax.swing.JLabel lbl_accesscode; private javax.swing.JLabel lbl_cardno; private javax.swing.JLabel lbl_name; private javax.swing.JLabel lbl_title; private javax.swing.JPasswordField txt_accesscode; private javax.swing.JTextField txt_cardno; private javax.swing.JTextField txt_name; // End of variables declaration //Verifying the USER boolean authen() { //Add the database query for user verification return true; } private void changepanel(Component objectname) { basepanel.removeAll(); basepanel.add(objectname); basepanel.repaint(); basepanel.validate(); } } </code></pre> <p><code>JPanel_menu</code>: (The page i need to display after pressing OK button)</p> <pre><code>/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.ratm.UI; /** * * @author Dinesh Prasanth */ public class JPanel_menu extends javax.swing.JPanel { /** * Creates new form JPanel_menu */ public JPanel_menu() { System.out.print("ENTERED"); initComponents(); 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") // &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt; private void initComponents() { jButton1 = new javax.swing.JButton(); jButton1.setText("jButton1"); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this); this.setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(325, 325, 325) .addComponent(jButton1) .addContainerGap(441, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap(239, Short.MAX_VALUE) .addComponent(jButton1) .addGap(218, 218, 218)) ); }// &lt;/editor-fold&gt; // Variables declaration - do not modify private javax.swing.JButton jButton1; // End of variables declaration } </code></pre> <p>I'm new to Java; please give the changes in detail.</p>
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