Ejemplo n.º 1
0
  void initControls() {
    JMenuItem jmi;

    jmi = new JMenuItem("JImage Menu");
    jmi.setEnabled(false);
    popupMenu.add(jmi);

    jmi = new JMenuItem("Fit");
    jmi.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            fit = true;
            repaint();
          }
        });
    popupMenu.add(jmi);

    JMenu scaleMenu = new JMenu("Set Scale");
    popupMenu.add(scaleMenu);
    int scales[] = new int[] {25, 50, 100, 200, 400, 800};

    for (int i = 0; i < scales.length; i++) {
      jmi = new JMenuItem(scales[i] + " %");
      jmi.addActionListener(new ScaleAction(scales[i]));
      scaleMenu.add(jmi);
    }

    MyListener l = new MyListener();
    addMouseMotionListener(l);
    addMouseListener(l);
    addMouseWheelListener(l);
    addKeyListener(l);
  }
  protected JMenu makeFileMenu() {
    JMenu fileMenu = new JMenu("File");

    fileMenu.add(
        new AbstractAction("Open/Count") {
          public void actionPerformed(ActionEvent ev) {
            doRead();
          }
        });

    fileMenu.add(
        new AbstractAction("Compress") {
          public void actionPerformed(ActionEvent ev) {
            doSave();
          }
        });

    fileMenu.add(
        new AbstractAction("Uncompress") {
          public void actionPerformed(ActionEvent ev) {
            doDecode();
          }
        });

    fileMenu.add(
        new AbstractAction("Quit") {
          public void actionPerformed(ActionEvent ev) {
            System.exit(0);
          }
        });
    return fileMenu;
  }
Ejemplo n.º 3
0
  /* constructor
   * Create a frame with JTextArea and a menubar
   * with a "File" dropdown menu.
   *
   * @param title: the title for the frame
   * @param whichFile: to indicate which load or save buuton
   */
  public OpenFileDir(String title, String whichFile) {
    super(title);
    fileNo = whichFile;
    Container content_pane = getContentPane();

    // Create a user interface.
    content_pane.setLayout(new BorderLayout());

    // Use the helper method makeMenuItem
    // for making the menu items and registering
    // their listener.
    JMenu m = new JMenu("File");

    // Modify task names to something relevant to
    // the particular program.
    m.add(fMenuLoad = makeMenuItem("Load"));
    m.add(fMenuSave = makeMenuItem("Save"));
    m.add(fMenuClose = makeMenuItem("Quit"));

    JMenuBar mb = new JMenuBar();
    mb.add(m);

    setJMenuBar(mb);
    setSize(400, 200);
  } /* end of the constructor */
  protected JMenu buildFileMenu() {
    JMenu file = new JMenu("File");
    JMenuItem newWin = new JMenuItem("New");
    JMenuItem open = new JMenuItem("Open");
    JMenuItem quit = new JMenuItem("Quit");

    newWin.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            newDocument();
          }
        });

    open.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            openDocument();
          }
        });

    quit.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            quit();
          }
        });

    file.add(newWin);
    file.add(open);
    file.addSeparator();
    file.add(quit);
    return file;
  }
Ejemplo n.º 5
0
  @Override
  public JPopupMenu getComponentPopupMenu() {
    if (popupMenu == null) {
      popupMenu = new JPopupMenu(Messages.CHART_COLON);
      timeRangeMenu = new JMenu(Messages.PLOTTER_TIME_RANGE_MENU);
      timeRangeMenu.setMnemonic(Resources.getMnemonicInt(Messages.PLOTTER_TIME_RANGE_MENU));
      popupMenu.add(timeRangeMenu);
      menuRBs = new JRadioButtonMenuItem[rangeNames.length];
      ButtonGroup rbGroup = new ButtonGroup();
      for (int i = 0; i < rangeNames.length; i++) {
        menuRBs[i] = new JRadioButtonMenuItem(rangeNames[i]);
        rbGroup.add(menuRBs[i]);
        menuRBs[i].addActionListener(this);
        if (viewRange == rangeValues[i]) {
          menuRBs[i].setSelected(true);
        }
        timeRangeMenu.add(menuRBs[i]);
      }

      popupMenu.addSeparator();

      saveAsMI = new JMenuItem(Messages.PLOTTER_SAVE_AS_MENU_ITEM);
      saveAsMI.setMnemonic(Resources.getMnemonicInt(Messages.PLOTTER_SAVE_AS_MENU_ITEM));
      saveAsMI.addActionListener(this);
      popupMenu.add(saveAsMI);
    }
    return popupMenu;
  }
Ejemplo n.º 6
0
 private JMenu addMenu(
     JMenuBar menuBar, String label, int mnemonic, String accessibleDescription) {
   JMenu menu = new JMenu(label);
   menu.setMnemonic(mnemonic);
   menu.getAccessibleContext().setAccessibleDescription(accessibleDescription);
   menuBar.add(menu);
   return menu;
 }
Ejemplo n.º 7
0
 public static JMenu createLookAndFeelMenu() {
   JMenu menu = new JMenu("LookAndFeel");
   ButtonGroup lookAndFeelRadioGroup = new ButtonGroup();
   for (UIManager.LookAndFeelInfo lafInfo : UIManager.getInstalledLookAndFeels()) {
     menu.add(
         createLookAndFeelItem(lafInfo.getName(), lafInfo.getClassName(), lookAndFeelRadioGroup));
   }
   return menu;
 }
Ejemplo n.º 8
0
  private void creerMenu() {
    menuBar = new JMenuBar();
    menuOption.add(menuNouvellePartie);
    menuOption.add(menuScore);

    menuBar.add(menuOption);
    menuBar.add(pause);
    menuBar.add(hint);

    setJMenuBar(menuBar);
  }
Ejemplo n.º 9
0
 // create the menu bar (changed to private)
 private static JMenuBar createMenuBar() {
   JMenuBar menuBar = new JMenuBar();
   JMenu menu = new JMenu("File");
   menuBar.add(menu);
   JMenuItem saveItem = new JMenuItem(" Save...   ");
   saveItem.addActionListener(std);
   saveItem.setAccelerator(
       KeyStroke.getKeyStroke(
           KeyEvent.VK_S, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
   menu.add(saveItem);
   return menuBar;
 }
 public TestFileDialog() {
   JMenu menu = new JMenu("File");
   JMenuItem openMI = new JMenuItem("Open");
   JMenuItem saveMI = new JMenuItem("Save");
   menu.add(openMI);
   menu.add(saveMI);
   JMenuBar bar = new JMenuBar();
   bar.add(menu);
   setJMenuBar(bar);
   openMI.addActionListener(new OpenListener());
   saveMI.addActionListener(new SaveListener());
 }
Ejemplo n.º 11
0
 /**
  * Create a menu for the app. By default this pulls the definition of the menu from the associated
  * resource file.
  */
 protected JMenu createMenu(String key) {
   JMenu menu = new JMenu(getResourceString(key + labelSuffix));
   for (String itemKey : getItemKeys(key)) {
     if (itemKey.equals("-")) {
       menu.addSeparator();
     } else {
       JMenuItem mi = createMenuItem(itemKey);
       menu.add(mi);
     }
   }
   return menu;
 }
Ejemplo n.º 12
0
 // set all menu items related to debugging enabled, all else disabled;
 // for insert, remove and fetch: continue, step
 // additionally for scripts: next and sometimes cancel
 private void enableDebug(boolean isScript, boolean enableCancel) {
   setAllEnabled(false);
   debugMenu.setEnabled(true);
   stepAction.setEnabled(true);
   cancelAction.setEnabled(enableCancel);
   nextAction.setEnabled(isScript);
   contAction.setEnabled(true);
   breakpointsItem.setEnabled(true);
   treeStatsMenu.setEnabled(true);
   utilItem.setEnabled(true);
   predSzItem.setEnabled(true);
   slotCntItem.setEnabled(true);
 }
Ejemplo n.º 13
0
  /*
   * Creates the JMenuBar for the GUI.
   */
  private JMenuBar menuBar() {
    menuBar = new JMenuBar();
    menu = new JMenu("Menu");
    load = new JMenuItem("Load...");
    saveAs = new JMenuItem("Save As...");
    load.addActionListener(new ActionListenerLoad());
    saveAs.addActionListener(new ActionListenerSave());

    // responseArea.addActionListener(new ActionListenerArea());
    menu.add(load);
    menu.add(saveAs);
    menuBar.add(menu);
    return menuBar;
  }
Ejemplo n.º 14
0
 /**
  * Create a menu for the app. By default this pulls the definition of the menu from the associated
  * resource file.
  */
 protected JMenu createMenu(String key) {
   String[] itemKeys = SCSUtility.tokenize(getResourceString(key));
   JMenu menu = new JMenu(getResourceString(key + "Label"));
   for (int i = 0; i < itemKeys.length; i++) {
     if (itemKeys[i].equals("-")) {
       menu.addSeparator();
     } else {
       // System.out.println("Debug:TextViewer:itemkey: "+itemKeys[i]);
       JMenuItem mi = createMenuItem(itemKeys[i]);
       menu.add(mi);
     }
   }
   return menu;
 }
  protected JMenu buildEditMenu() {
    JMenu edit = new JMenu("Edit");
    JMenuItem undo = new JMenuItem("Undo");
    JMenuItem copy = new JMenuItem("Copy");
    JMenuItem cut = new JMenuItem("Cut");
    JMenuItem paste = new JMenuItem("Paste");
    JMenuItem prefs = new JMenuItem("Preferences...");

    undo.setEnabled(false);
    copy.setEnabled(false);
    cut.setEnabled(false);
    paste.setEnabled(false);

    prefs.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            openPrefsWindow();
          }
        });

    edit.add(undo);
    edit.addSeparator();
    edit.add(cut);
    edit.add(copy);
    edit.add(paste);
    edit.addSeparator();
    edit.add(prefs);
    return edit;
  }
Ejemplo n.º 16
0
  private void createJMenuBar() {
    menubar = new JMenuBar();
    JMenu menu = null;
    JMenuItem item = null;

    menubar.add(menu = new JMenu("Edit"));
    menu.add(item = new JMenuItem("Edit Object..."));

    item.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            browser.editSelected();
          }
        });
  }
Ejemplo n.º 17
0
 private void addMenuItem(
     JMenu menu,
     String label,
     int mnemonic,
     String accessibleDescription,
     String actionCallbackName)
     throws NoSuchMethodException {
   JMenuItem menuItem = new JMenuItem(label, mnemonic);
   menuItem
       .getAccessibleContext()
       .setAccessibleDescription((accessibleDescription != null) ? accessibleDescription : label);
   final Method callback =
       getClass().getMethod(actionCallbackName, new Class[] {ActionEvent.class});
   menuItem.addActionListener(
       new ActionListener() {
         public void actionPerformed(ActionEvent e) {
           try {
             callback.invoke(WordListScreen.this, new Object[] {e});
           } catch (InvocationTargetException ex) {
             handleException(ex.getTargetException());
           } catch (IllegalAccessException ex) {
             handleException(ex);
           }
         }
       });
   menu.add(menuItem);
 }
Ejemplo n.º 18
0
  // Method to open a file for sequential read-only.
  private void openFile() {
    // Define local primitive(s).
    String contents = new String();

    // If a file is open, prompt to save the file before dismissing content
    // and reference.
    if (!file.toString().equals("")) {
      // Close the existing file.
      closeFile();
    } // End of if file not null or not equal to a zero String.

    // Open a file.
    fileName = FileIO.findFile(this);

    // If a file name is returned.
    if (fileName != null) {
      // Read file.
      contents = FileIO.openFile(this, fileName);

      // Verify that the JTextAreaPanel is empty.
      if (sender.isTextAreaEmpty()) {
        // Set JTextAreaPanel.
        sender.setText(contents);

      } // End of if JTextAreaPanel is empty.
      else {
        // Reset JTextAreaPanel by replacing the range.
        sender.replaceRange(contents, 0, sender.getText().length());
      } // End of else JTextAreaPanel is not empty.

      // Set file open flag to true.
      fileOpen = true;
    } // End of if a fileName is selected.
  } // End of openFile method.
Ejemplo n.º 19
0
 private void addProfiles(JMenu menu, String[] profileNames, ActionListener listener) {
   for (int i = 0; i < profileNames.length; i++) {
     JMenuItem item = new JMenuItem(profileNames[i]);
     item.addActionListener(listener);
     menu.add(item);
   }
 }
Ejemplo n.º 20
0
  public void populateMenu(JMenu menu, int flags) {
    if (flags == (Plugin.MENU_TOOLS | Plugin.MENU_MID)) {
      Sketch sketch = editor.getSketch();
      JMenuItem item = new JMenu("Program Bootloader");
      item.addActionListener(
          new ActionListener() {
            public void actionPerformed(ActionEvent e) {
              run();
            }
          });
      menu.add(item);

      PropertyFile props = sketch.mergeAllProperties();
      String blProgs = props.get("bootloader.upload");
      if (blProgs == null) {
        JMenuItem sub = new JMenuItem("No bootloader programmer defined!");
        item.add(sub);
        return;
      }
      String[] progs = blProgs.split("::");
      for (String prog : progs) {
        JMenuItem sub = new JMenuItem(sketch.parseString(props.get("upload." + prog + ".name")));
        sub.setActionCommand(prog);
        sub.addActionListener(
            new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                doProgram(e.getActionCommand());
              }
            });
        item.add(sub);
      }
    }
  }
Ejemplo n.º 21
0
  public void refreshSerialPortList() {

    String[] serialPortList = SerialPortList.getPortNames();

    portMenu.removeAll();

    portMenu.add(refreshItem);

    JMenuItem menuItem;
    for (String serialPort : serialPortList) {

      menuItem = new JMenuItem(serialPort);
      menuItem.addActionListener(e -> onSerialPortClicked(e.getActionCommand()));
      portMenu.add(menuItem);
    }
  }
  protected JMenu buildSpeedMenu() {
    JMenu speed = new JMenu("Drag");

    JRadioButtonMenuItem live = new JRadioButtonMenuItem("Live");
    JRadioButtonMenuItem outline = new JRadioButtonMenuItem("Outline");

    JRadioButtonMenuItem slow = new JRadioButtonMenuItem("Old and Slow");

    ButtonGroup group = new ButtonGroup();

    group.add(live);
    group.add(outline);
    group.add(slow);

    live.setSelected(true);

    slow.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            // for right now I'm saying if you set the mode
            // to something other than a specified mode
            // it will revert to the old way
            // This is mostly for comparison's sake
            desktop.setDragMode(-1);
          }
        });

    live.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            desktop.setDragMode(JDesktopPane.LIVE_DRAG_MODE);
          }
        });

    outline.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
          }
        });

    speed.add(live);
    speed.add(outline);
    speed.add(slow);
    return speed;
  }
Ejemplo n.º 23
0
  public SwingWorkerFrame() {
    chooser = new JFileChooser();
    chooser.setCurrentDirectory(new File("."));

    textArea = new JTextArea(TEXT_ROWS, TEXT_COLUMNS);
    add(new JScrollPane(textArea));

    statusLine = new JLabel(" ");
    add(statusLine, BorderLayout.SOUTH);

    JMenuBar menuBar = new JMenuBar();
    setJMenuBar(menuBar);

    JMenu menu = new JMenu("File");
    menuBar.add(menu);

    openItem = new JMenuItem("Open");
    menu.add(openItem);
    openItem.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent event) {
            // show file chooser dialog
            int result = chooser.showOpenDialog(null);

            // if file selected, set it as icon of the label
            if (result == JFileChooser.APPROVE_OPTION) {
              textArea.setText("");
              openItem.setEnabled(false);
              textReader = new TextReader(chooser.getSelectedFile());
              textReader.execute();
              cancelItem.setEnabled(true);
            }
          }
        });

    cancelItem = new JMenuItem("Cancel");
    menu.add(cancelItem);
    cancelItem.setEnabled(false);
    cancelItem.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent event) {
            textReader.cancel(true);
          }
        });
    pack();
  }
Ejemplo n.º 24
0
  private void buildMenu() {
    jMenuBar = new javax.swing.JMenuBar();
    mainMenu = new javax.swing.JMenu();
    mainMenu.setText("Main");

    loginMenuItem = new JMenuItem("Login...");
    loginMenuItem.addActionListener(
        new java.awt.event.ActionListener() {
          public void actionPerformed(java.awt.event.ActionEvent evt) {
            headerPanel.handleLoginLogout();
          }
        });

    mainMenu.add(loginMenuItem);

    exitMenuItem = new JMenuItem("Exit");
    exitMenuItem.addActionListener(
        new java.awt.event.ActionListener() {
          public void actionPerformed(java.awt.event.ActionEvent evt) {
            if (qsadminMain.isConnected() == true) {
              headerPanel.handleLoginLogout();
            }
            System.exit(0);
          }
        });
    mainMenu.add(exitMenuItem);

    helpMenu = new javax.swing.JMenu();
    helpMenu.setText("Help");

    aboutMenuItem = new JMenuItem("About...");
    aboutMenuItem.setEnabled(true);
    aboutMenuItem.addActionListener(
        new java.awt.event.ActionListener() {
          public void actionPerformed(java.awt.event.ActionEvent evt) {
            about();
          }
        });
    helpMenu.add(aboutMenuItem);

    jMenuBar.add(mainMenu);
    jMenuBar.add(helpMenu);

    parentFrame.setJMenuBar(jMenuBar);
  }
  protected JMenu buildViewsMenu() {
    JMenu views = new JMenu("Views");

    JMenuItem inBox = new JMenuItem("Open In-Box");
    JMenuItem outBox = new JMenuItem("Open Out-Box");
    outBox.setEnabled(false);

    inBox.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            openInBox();
          }
        });

    views.add(inBox);
    views.add(outBox);
    return views;
  }
Ejemplo n.º 26
0
 public void actionPerformed(ActionEvent ev) {
   JComponent src = (JComponent) ev.getSource();
   if (src == saveAsMI) {
     saveAs();
   } else {
     int index = timeRangeMenu.getPopupMenu().getComponentIndex(src);
     setViewRange(rangeValues[index]);
   }
 }
Ejemplo n.º 27
0
 /**
  * Creates the attributes menu and its submenus. Clients override this method to add additional
  * menu items.
  */
 protected JMenu createAttributesMenu() {
   JMenu menu = new JMenu("Attributes");
   menu.add(createColorMenu("Fill Color", "FillColor"));
   menu.add(createColorMenu("Pen Color", "FrameColor"));
   menu.add(createArrowMenu());
   menu.addSeparator();
   menu.add(createFontMenu());
   menu.add(createFontSizeMenu());
   menu.add(createFontStyleMenu());
   menu.add(createColorMenu("Text Color", "TextColor"));
   return menu;
 }
Ejemplo n.º 28
0
  public ShowComp() throws InterruptedException, IOException {
    super("CONNECTED COMPUTERS");
    int x = 0, d = 20;
    mb = new JMenuBar();
    File = new JMenu("File");
    mb.add(File);
    exit = new JMenuItem("Exit");
    exit.addActionListener(this);
    File.add(exit);
    ta = new JTextArea();
    ta.setBounds(20, 30, 315, 470);
    ta.setEditable(false);
    add(ta);

    setJMenuBar(mb);

    sel = new JLabel("The connected computers are..");
    sel.setBounds(15, 5, 300, 30);
    add(sel);
    b1 = new JButton("<< BACK");
    b1.setBounds(140, 510, 100, 30);
    b1.setToolTipText("Back to main page");
    b1.addActionListener(this);
    add(b1);
    setLayout(null);
    while (x < 360) {
      x = x + d;
      setBounds(675, 50, x, 600);
      this.show();
    }
    // setVisible(true);
    String s = "192.168.0.", temp = null;
    Printer printer = new Printer();
    printer.start();
    Connector connector = new Connector(printer);
    connector.start();

    LinkedList targets = new LinkedList();
    for (int i = 1; i <= 255; i++) {
      temp = s + Integer.toString(i);
      Target t = new Target(temp);
      targets.add(t);
      connector.add(t);
    }
    Thread.sleep(2000);
    connector.shutdown();
    connector.join();

    for (Iterator i = targets.iterator(); i.hasNext(); ) {
      Target t = (Target) i.next();
      if (!t.shown) t.show();
    }

    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
  }
Ejemplo n.º 29
-1
  public void go() {
    frame = new JFrame("Quiz Card Player");
    JPanel mainPanel = new JPanel();
    Font bigFont = new Font("sanserif", Font.BOLD, 24);

    display = new JTextArea(10, 20);
    display.setFont(bigFont);
    display.setLineWrap(true);
    display.setEditable(false);

    JScrollPane qScroller = new JScrollPane(display);
    qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

    nextButton = new JButton("Show Questions");
    nextButton.addActionListener(new NextCardListener());

    mainPanel.add(qScroller);
    mainPanel.add(nextButton);

    JMenuBar menuBar = new JMenuBar();
    JMenu fileMenu = new JMenu("File");
    JMenuItem loadMenuItem = new JMenuItem("Load Card Set");
    loadMenuItem.addActionListener(new OpenMenuListener());
    fileMenu.add(loadMenuItem);
    menuBar.add(fileMenu);

    frame.setJMenuBar(menuBar);
    frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
    frame.setSize(640, 500);
    frame.setVisible(true);
  }
Ejemplo n.º 30
-1
  public void go() {
    // build gui

    frame = new JFrame("Quiz Card Buider");
    JPanel mainPanel = new JPanel();
    Font bigFont = new Font("sanserif", Font.BOLD, 24);
    question = new JTextArea(6, 20);
    question.setLineWrap(true);
    question.setWrapStyleWord(true);
    question.setFont(bigFont);

    JScrollPane qScroller = new JScrollPane(question);
    qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

    answer = new JTextArea(6, 20);
    answer.setLineWrap(true);
    answer.setWrapStyleWord(true);
    answer.setFont(bigFont);

    JScrollPane aScroller = new JScrollPane(question);
    aScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
    aScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

    JButton nextButton = new JButton("Next Card");

    cardList = new ArrayList<QuizCard>();

    JLabel qLabel = new JLabel("Question");
    JLabel aLabel = new JLabel("Answer");

    mainPanel.add(qLabel);
    mainPanel.add(qScroller);
    mainPanel.add(aLabel);
    mainPanel.add(aScroller);
    mainPanel.add(nextButton);

    nextButton.addActionListener(new NextCardListener());

    JMenuBar menuBar = new JMenuBar();

    JMenu fileMenu = new JMenu("File");

    JMenuItem newMenuItem = new JMenuItem("New");
    JMenuItem saveMenuItem = new JMenuItem("Save");
    newMenuItem.addActionListener(new NewMenuListener());
    saveMenuItem.addActionListener(new SaveMenuListener());

    fileMenu.add(newMenuItem);
    fileMenu.add(saveMenuItem);
    menuBar.add(fileMenu);
    frame.setJMenuBar(menuBar);
    frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
    frame.setSize(500, 600);
    frame.setVisible(true);
    // frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

  }