Validating enabled and disabled menu bar in JInternalFrame

Question

hi,
everybody.
i have created a main window using JInternalFrame and JDesktopPane. The window has a menu bar in which document menu is used for closing the main window, while employee menu is used for adding new frame for the employee. while the login frame is displayed when the application is executed.
my problem is, i want to validate that before login process, employee menu should be disabled, and after login is performed employee menu is enabled.
the following is my code.
please reply me as i am stucked with it.
waiting for the reply
thanks in advance.
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.*;
public class InternalFrameDemo extends JFrame implements ActionListener
JDesktopPane desktop;
public InternalFrameDemo()
super("InternalFrameDemo");
int inset = 50;
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(inset, inset, screenSize.width - inset*2, screenSize.height - inset*2);
desktop = new JDesktopPane();
setContentPane(desktop);
desktop.setBackground(Color.white);
setJMenuBar(createMenuBar());
desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
createLogin();
public JMenuBar createMenuBar()
JMenuBar menuBar = new JMenuBar();
JMenu menu = new JMenu("Document");
menu.setMnemonic(KeyEvent.VK_D);
menuBar.add(menu);
JMenuItem menuItem = new JMenuItem("Quit");
menuItem.setMnemonic(KeyEvent.VK_Q);
menuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_Q, ActionEvent.ALT_MASK));
menuItem.setActionCommand("quit");
menuItem.addActionListener(this);
menu.add(menuItem);
JMenu employee = new JMenu("Employee");
employee.setMnemonic(KeyEvent.VK_E);
employee.setActionCommand("employee");
menuBar.add(employee);
JMenuItem additem = new JMenuItem("Add");
additem.setMnemonic(KeyEvent.VK_A);
additem.setActionCommand("add");
additem.addActionListener(this);
employee.add(additem);
return menuBar;
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("add"))
System.out.println("Employee Form Invoked");
createEmployee();
else if(str.equals("quit"))
quit();
public void createEmployee()
MyEmployeeFrame employeeframe = new MyEmployeeFrame();
employeeframe.setVisible(true);
desktop.add(employeeframe);
try
employeeframe.setSelected(true);
catch(Exception e)
public void createLogin()
MyLogin loginframe = new MyLogin();
loginframe.setVisible(true);
desktop.add(loginframe);
try
loginframe.setSelected(true);
catch(Exception e){}
public void quit()
System.exit(0);
private static void createAndShowGUI()
JFrame.setDefaultLookAndFeelDecorated(true);
InternalFrameDemo frame = new InternalFrameDemo();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800,600);
frame.setVisible(true);
public static void main(String a[])
createAndShowGUI();
class MyEmployeeFrame extends JInternalFrame implements ActionListener
JFrame employeeframe;
JLabel labelfirstname;
JLabel labellastname;
JLabel labelage;
JLabel labeladdress;
JLabel labelcity;
JLabel labelstate;
JTextField textfirstname;
JTextField textlastname;
JTextField textage;
JTextField textaddress;
JTextField textcity;
JTextField textstate;
JButton buttonsave;
FileOutputStream out;
PrintStream p;
String strfirstname,strlastname,strage,straddress,strcity,strstate;
GridBagLayout gl;
GridBagConstraints gbc;
public MyEmployeeFrame()
super("Employee Details",true,true,true,true);
setSize(500,400);
labelfirstname = new JLabel("First Name");
labellastname = new JLabel("Last Name");
labelage = new JLabel("Age");
labeladdress = new JLabel("Address");
labelcity = new JLabel("City");
labelstate = new JLabel("State");
textfirstname = new JTextField(10);
textlastname = new JTextField(10);
textage = new JTextField(5);
textaddress = new JTextField(15);
textcity = new JTextField(10);
textstate = new JTextField(10);
buttonsave = new JButton("Save");
gl = new GridBagLayout();
gbc = new GridBagConstraints();
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 3;
gl.setConstraints(labelfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 3;
gl.setConstraints(textfirstname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labellastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 5;
gl.setConstraints(textlastname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 7;
gl.setConstraints(labelage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 7;
gl.setConstraints(textage,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 9;
gl.setConstraints(labeladdress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 9;
gl.setConstraints(textaddress,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 11;
gl.setConstraints(labelcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 11;
gl.setConstraints(textcity,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 13;
gl.setConstraints(labelstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 13;
gl.setConstraints(textstate,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 3;
gbc.gridy = 17;
gl.setConstraints(buttonsave,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelfirstname);
contentpane.add(textfirstname);
contentpane.add(labellastname);
contentpane.add(textlastname);
contentpane.add(labelage);
contentpane.add(textage);
contentpane.add(labeladdress);
contentpane.add(textaddress);
contentpane.add(labelcity);
contentpane.add(textcity);
contentpane.add(labelstate);
contentpane.add(textstate);
contentpane.add(buttonsave);
buttonsave.addActionListener(this);
public void reset()
textfirstname.setText("");
textlastname.setText("");
textage.setText("");
textaddress.setText("");
textcity.setText("");
textstate.setText("");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
System.out.println(str);
if(str.equalsIgnoreCase("Save"))
try
out = new FileOutputStream("myfile.txt",true);
p = new PrintStream( out );
strfirstname = textfirstname.getText();
strlastname = textlastname.getText();
strage = textage.getText();
straddress = textaddress.getText();
strcity = textcity.getText();
strstate = textstate.getText();
p.print(strfirstname+"|");
p.print(strlastname+"|");
p.print(strage+"|");
p.print(straddress+"|");
p.print(strcity+"|");
p.println(strstate);
System.out.println("Record Saved");
reset();
p.close();
catch (Exception e)
System.err.println ("Error writing to file");
class MyLogin extends JInternalFrame implements ActionListener
JFrame loginframe;
JLabel labelname;
JLabel labelpassword;
JTextField textname;
JPasswordField textpassword;
JButton okbutton;
String name = "";
FileOutputStream out;
PrintStream p;
Date date;
GregorianCalendar gcal;
GridBagLayout gl;
GridBagConstraints gbc;
public MyLogin()
super("Login",true,true,true,true);
setSize(400,300);
gl = new GridBagLayout();
gbc = new GridBagConstraints();
labelname = new JLabel("User");
labelpassword = new JLabel("Password");
textname = new JTextField("",9);
textpassword = new JPasswordField(5);
okbutton = new JButton("OK");
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 5;
gl.setConstraints(labelname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 5;
gl.setConstraints(textname,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 10;
gl.setConstraints(labelpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 2;
gbc.gridy = 10;
gl.setConstraints(textpassword,gbc);
gbc.anchor = GridBagConstraints.NORTHWEST;
gbc.gridx = 1;
gbc.gridy = 15;
gl.setConstraints(okbutton,gbc);
Container contentpane = getContentPane();
contentpane.setLayout(gl);
contentpane.add(labelname);
contentpane.add(labelpassword);
contentpane.add(textname);
contentpane.add(textpassword);
contentpane.add(okbutton);
okbutton.addActionListener(this);
public void reset()
textname.setText("");
textpassword.setText("");
public void run()
try
String text = textname.getText();
String blank="";
if(text.equals(blank))
System.out.println("First Enter a UserName");
else
if(text != blank)
date = new Date();
gcal = new GregorianCalendar();
gcal.setTime(date);
out = new FileOutputStream("log.txt",true);
p = new PrintStream( out );
name = textname.getText();
String entry = "UserName:- " + name + " Logged in:- " + gcal.get(Calendar.HOUR) + ":" + gcal.get(Calendar.MINUTE) + " Date:- " + gcal.get(Calendar.DATE) + "/" + gcal.get(Calendar.MONTH) + "/" + gcal.get(Calendar.YEAR);
p.println(entry);
System.out.println("Record Saved");
reset();
p.close();
catch (IOException e)
System.err.println("Error writing to file");
public void actionPerformed(ActionEvent ae)
String str = ae.getActionCommand();
if(str.equals("OK"))
run();
loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}

Answer 1

I realize this post is from a few days ago, but if you're still looking for help:
This is my first thought on how to do this. Unfortunately, it's a bit messy. JMenuItems can be enabled and disabled but JMenus don't have this option...
public class InternalFrameDemo extends JFrame implements ActionListener
    JDesktopPane desktop;
    JMenuBar menuBar;
    public InternalFrameDemo()
     setJMenuBar(createMenuBar());
     desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
     createLogin();
    public JMenuBar createMenuBar()
     menuBar = new JMenuBar();
     JMenu menu = new JMenu("Document");
     menu.setMnemonic(KeyEvent.VK_D);
     menuBar.add(menu);
     JMenuItem menuItem = new JMenuItem("Quit");
     menuItem.setMnemonic(KeyEvent.VK_Q);
     menuItem.setAccelerator(KeyStroke.getKeyStroke( KeyEvent.VK_Q, ActionEvent.ALT_MASK));
     menuItem.setActionCommand("quit");
     menuItem.addActionListener(this);
     menu.add(menuItem);
     JMenuItem additem = new JMenuItem("Add");
     additem.setMnemonic(KeyEvent.VK_A);
     additem.setActionCommand("add");
     additem.addActionListener(this);
     employee.add(additem);
     return menuBar;
    public void createLogin()
     MyLogin loginframe = new MyLogin( menuBar );
     loginframe.setVisible(true);
     desktop.add(loginframe);
     try
         loginframe.setSelected(true);
     catch(Exception e)
class MyLogin extends JInternalFrame implements ActionListener
    JMenuBar menuBar;
    public MyLogin( JMenuBar menuBar1 )
     super("Login",true,true,true,true);
     menuBar = menuBar1;
    public void actionPerformed(ActionEvent ae)
     String str = ae.getActionCommand();
     if(str.equals("OK"))
         run();
         JMenu employee = new JMenu("Employee");
         employee.setMnemonic(KeyEvent.VK_E);
         employee.setActionCommand("employee");
         menuBar.add(employee);
         loginframe.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}