JFRAME and Window?????????

[bilinmiyo]

Hello,

I created JFrame with JMenu and its items. But I dont know how to add a Window into JFrame when one of the JMenu items is selected and I want to create a new window for all other menu items. Below is the sample code.

public class MainFrame extends javax.swing.JFrame {
    private JMenuBar menuBar;

    private JMenu fileMenu;
        private JMenuItem connectItem;
    private JMenuItem exitItem;
    private Connection connection;

   
    public MainFrame() {

        super( "Application" );

        menuBar = new JMenuBar();

        fileMenu = new JMenu();
        connectItem = new JMenuItem();
        exitItem = new JMenuItem();

        fileMenu.setMnemonic('F');
        fileMenu.setText("File");

        connectItem.setMnemonic('L');
        connectItem.setText("Connect");
        fileMenu.add(connectItem);
        connectItem.addActionListener(

    new ActionListener() // anonymous inner class
    {
        public void actionPerformed( ActionEvent event )
        {

    
                       
            }//end of action performed
        }//end of inner class
        ); // end of addAction Lister

        exitItem.setMnemonic('E');
        exitItem.setText("Exit");
        exitItem.addActionListener(
        new ActionListener() // anonymous inner class
                {
        public void actionPerformed( ActionEvent event )
        {

             System.exit( 0 );
        }//end of action performed
                }//end of inner class
        ); // end of addAction Lister

        fileMenu.add(exitItem);
        menuBar.add(fileMenu);

        setJMenuBar(menuBar);// set menu bar for this application

 }//enf of Public MainFrame


}//end of class Main Frame 

thank you for your help in advance

[sjalle]

When you say you want to add a new window into a JFrame, then that has
to be a panel, and that is what this solution uses.
I also plucked out the inner anonymous listener classes and made the
frame an action listener; why people want make a new inner anonymous
class for every little responsive thingie in a GUI beats me....

In this setup the panels are stored in a hashtable for reuse, e.g. when the
user selects 'connect' then the previous connect panel (if any) will show.

import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
import java.util.*;

class CenterPanel extends JPanel {
  private JLabel lbl=new JLabel();
  private JTextField tf=new JTextField(22);
  public CenterPanel(String choice) {
    lbl.setText(choice);
    add(lbl);
    add(tf);
  }
  public String getLabelText() {
    return this.lbl.getText();
  }
  public boolean equals (Object ob) {
    if (! (ob instanceof CenterPanel) ) return false;
    CenterPanel p=(CenterPanel)ob;
    return lbl.getText().equals(p.getLabelText());
  }

}

public class MainFrame
    extends javax.swing.JFrame  implements ActionListener  {
  private JMenuBar menuBar;

  private JMenu fileMenu;
  private JMenuItem connectItem;
  private JMenuItem testItem;
  private JMenuItem exitItem;
  private Connection connection;
  private Hashtable panelHt=new Hashtable();

  public MainFrame() {

    super("Application");

    getContentPane().setLayout(new BorderLayout());

    menuBar = new JMenuBar();

    fileMenu = new JMenu();
    connectItem = new JMenuItem();
    exitItem = new JMenuItem();
    testItem = new JMenuItem();

    fileMenu.setMnemonic('F');
    fileMenu.setText("File");

    connectItem.setMnemonic('L');
    connectItem.setText("Connect");

    testItem.setMnemonic('T');
    testItem.setText("Test");


    exitItem.setMnemonic('E');
    exitItem.setText("Exit");

    // anonymous inner listener classes sux....
    connectItem.addActionListener(this);
    testItem.addActionListener(this);
    exitItem.addActionListener(this);

    fileMenu.add(connectItem);
    fileMenu.add(testItem);
    fileMenu.add(exitItem);

    menuBar.add(fileMenu);

    setJMenuBar(menuBar); // set menu bar for this application

  } //enf of Public MainFrame
  /**
   * Handle the actions
   * @param e
   */
  public void actionPerformed(ActionEvent e) {
   if (e.getActionCommand().equals("Exit")) {
      System.exit(0);
   } else {
     setCenterPanel(e.getActionCommand());
   }
 }

  /**
   * Panel swapping
   * @param s
   */
  private void setCenterPanel (String s) {
    // first remove any old centerpanel
    Component [] cmp=getContentPane().getComponents();
    for (int i=0; i<cmp.length; i++) {
      if (cmp[i] instanceof CenterPanel) {
        getContentPane().remove(cmp[i]);
        break;
      }
    }
    // then check if we have made the panel already, lookup in hashtable.
    CenterPanel aPanel=(CenterPanel)panelHt.get(s);
    if (aPanel==null) {
      aPanel=new CenterPanel(s); // nope, make a new one
      panelHt.put(aPanel.getLabelText(),aPanel); // store in hashtable
    }
    getContentPane().add(aPanel, BorderLayout.CENTER); // show it

    validate();
    repaint();
  }
  public static void main (String [] args) {
    MainFrame mf=new MainFrame();
    mf.setBounds(20,20,400,300);
    mf.setVisible(true);
  }
} //end of class Main Frame          }//end of class Main Frame