Java by API/javax.swing/JMenuItem

JMenuItem: addActionListener(ActionListener l)

   <source lang="java">

import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.AbstractButton; import javax.swing.Icon; import javax.swing.JCheckBoxMenuItem; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; public class Main {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("MenuSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JMenuBar menuBar = new JMenuBar();
   // File Menu, F - Mnemonic
   JMenu fileMenu = new JMenu("File");
   fileMenu.setMnemonic(KeyEvent.VK_F);
   menuBar.add(fileMenu);
   // File->New, N - Mnemonic
   JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N);
   fileMenu.add(newMenuItem);
   JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Case Sensitive");
   caseMenuItem.setMnemonic(KeyEvent.VK_C);
   fileMenu.add(caseMenuItem);
   ActionListener aListener = new ActionListener() {
     public void actionPerformed(ActionEvent event) {
       AbstractButton aButton = (AbstractButton) event.getSource();
       boolean selected = aButton.getModel().isSelected();
       String newLabel;
       Icon newIcon;
       if (selected) {
         newLabel = "A";
       } else {
         newLabel = "B";
       }
       aButton.setText(newLabel);
     }
   };
   caseMenuItem.addActionListener(aListener);
   frame.setJMenuBar(menuBar);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem: addChangeListener(ChangeListener l)

   <source lang="java">

 

import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; public class Main {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("MenuSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JMenuBar menuBar = new JMenuBar();
   // File Menu, F - Mnemonic
   JMenu fileMenu = new JMenu("File");
   fileMenu.setMnemonic(KeyEvent.VK_F);
   menuBar.add(fileMenu);
   fileMenu.addChangeListener(new ChangeListener() {
     public void stateChanged(ChangeEvent e) {
       System.out.println("File Menu Changed");
     }
   });
   // File->New, N - Mnemonic
   JMenuItem newMenuItem = new JMenuItem("New");
   fileMenu.add(newMenuItem);
   newMenuItem.addChangeListener(new ChangeListener() {
     public void stateChanged(ChangeEvent e) {
       System.out.println("new menu item changed");
     }
   });
   frame.setJMenuBar(menuBar);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem: addItemListener(ItemListener l)

   <source lang="java">

import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.KeyEvent; import javax.swing.AbstractButton; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JCheckBoxMenuItem; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; public class Main {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("MenuSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JMenuBar menuBar = new JMenuBar();
   // File Menu, F - Mnemonic
   JMenu fileMenu = new JMenu("File");
   fileMenu.setMnemonic(KeyEvent.VK_F);
   menuBar.add(fileMenu);
   // File->New, N - Mnemonic
   JMenuItem newMenuItem = new JMenuItem("New", KeyEvent.VK_N);
   fileMenu.add(newMenuItem);
   JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Case Sensitive");
   caseMenuItem.setMnemonic(KeyEvent.VK_C);
   fileMenu.add(caseMenuItem);
   ItemListener iListener = new ItemListener() {
     public void itemStateChanged(ItemEvent event) {
       Icon girlIcon = new ImageIcon("g.jpg");
       Icon boyIcon = new ImageIcon("b.jpg");
       AbstractButton aButton = (AbstractButton)event.getSource();
       int state = event.getStateChange();
       String newLabel;
       Icon newIcon;
       if (state == ItemEvent.SELECTED) {
         newLabel = "Girl";
         newIcon = girlIcon;
       } else {
         newLabel = "Boy";
         newIcon = boyIcon;
       }
       aButton.setText(newLabel);
       aButton.setIcon(newIcon);
     }
   };
   caseMenuItem.addItemListener(iListener);
   frame.setJMenuBar(menuBar);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem: addMenuDragMouseListener(MenuDragMouseListener l)

   <source lang="java">

import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.event.MenuDragMouseEvent; import javax.swing.event.MenuDragMouseListener; public class Main {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("MenuSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JMenuBar menuBar = new JMenuBar();
   // File Menu, F - Mnemonic
   JMenu fileMenu = new JMenu("File");
   fileMenu.setMnemonic(KeyEvent.VK_F);
   menuBar.add(fileMenu);
   // File->New, N - Mnemonic
   JMenuItem newMenuItem = new JMenuItem("asdf");
   fileMenu.add(newMenuItem);
   
   newMenuItem.addMenuDragMouseListener(new MenuDragMouseListener(){
     public void menuDragMouseEntered(MenuDragMouseEvent e) {
       System.out.println("menuDragMouseEntered");        
     }
     public void menuDragMouseExited(MenuDragMouseEvent e) {
      System.out.println("menuDragMouseExited");
       
     }
     public void menuDragMouseDragged(MenuDragMouseEvent e) {
       System.out.println("menuDragMouseDragged");
       
     }
     public void menuDragMouseReleased(MenuDragMouseEvent e) {
       System.out.println("menuDragMouseReleased");
       
     }});
   frame.setJMenuBar(menuBar);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem: addMenuKeyListener(MenuKeyListener l)

   <source lang="java">

import java.awt.event.KeyEvent; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.event.MenuKeyEvent; import javax.swing.event.MenuKeyListener; public class Main {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("MenuSample Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JMenuBar menuBar = new JMenuBar();
   // File Menu, F - Mnemonic
   JMenu fileMenu = new JMenu("File");
   fileMenu.setMnemonic(KeyEvent.VK_F);
   menuBar.add(fileMenu);
   // File->New, N - Mnemonic
   JMenuItem newMenuItem = new JMenuItem("asdf");
   fileMenu.add(newMenuItem);
   
   newMenuItem.addMenuKeyListener(new MenuKeyListener(){
     public void menuKeyTyped(MenuKeyEvent e) {
      System.out.println("KeyTyped");
     }
     public void menuKeyPressed(MenuKeyEvent e) {
       System.out.println("KeyPressed");
     }
     public void menuKeyReleased(MenuKeyEvent e) {
       System.out.println("KeyReleased");
     }});
   
   frame.setJMenuBar(menuBar);
   frame.setSize(350, 250);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem.RIGHT

   <source lang="java">

import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JPopupMenu; import javax.swing.border.BevelBorder; import javax.swing.event.PopupMenuEvent; import javax.swing.event.PopupMenuListener; public class MainClass extends JPanel {

 public JPopupMenu popup;
 public MainClass() {
   popup = new JPopupMenu();
   ActionListener menuListener = new ActionListener() {
     public void actionPerformed(ActionEvent event) {
       System.out.println("Popup menu item [" + event.getActionCommand() + "] was pressed.");
     }
   };
   JMenuItem item;
   popup.add(item = new JMenuItem("Left", new ImageIcon("left.gif")));
   item.setHorizontalTextPosition(JMenuItem.RIGHT);
   item.addActionListener(menuListener);
   popup.add(item = new JMenuItem("Center", new ImageIcon("center.gif")));
   item.setHorizontalTextPosition(JMenuItem.RIGHT);
   item.addActionListener(menuListener);
   popup.add(item = new JMenuItem("Right", new ImageIcon("right.gif")));
   item.setHorizontalTextPosition(JMenuItem.RIGHT);
   item.addActionListener(menuListener);
   popup.add(item = new JMenuItem("Full", new ImageIcon("full.gif")));
   item.setHorizontalTextPosition(JMenuItem.RIGHT);
   item.addActionListener(menuListener);
   popup.addSeparator();
   popup.add(item = new JMenuItem("Settings . . ."));
   item.addActionListener(menuListener);
   popup.setLabel("Justification");
   popup.setBorder(new BevelBorder(BevelBorder.RAISED));
   popup.addPopupMenuListener(new PopupPrintListener());
   addMouseListener(new MousePopupListener());
 }
 // An inner class to check whether mouse events are the popup trigger
 class MousePopupListener extends MouseAdapter {
   public void mousePressed(MouseEvent e) {
     checkPopup(e);
   }
   public void mouseClicked(MouseEvent e) {
     checkPopup(e);
   }
   public void mouseReleased(MouseEvent e) {
     checkPopup(e);
   }
   private void checkPopup(MouseEvent e) {
     if (e.isPopupTrigger()) {
       popup.show(MainClass.this, e.getX(), e.getY());
     }
   }
 }
 // An inner class to show when popup events occur
 class PopupPrintListener implements PopupMenuListener {
   public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
     System.out.println("Popup menu will be visible!");
   }
   public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
     System.out.println("Popup menu will be invisible!");
   }
   public void popupMenuCanceled(PopupMenuEvent e) {
     System.out.println("Popup menu is hidden!");
   }
 }
 public static void main(String s[]) {
   JFrame frame = new JFrame("Popup Menu Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setContentPane(new MainClass());
   frame.setSize(300, 300);
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

JMenuItem: setAccelerator(KeyStroke key)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.ruponent; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.InputEvent; import java.awt.event.KeyEvent; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.Icon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.KeyStroke; public class MainClass {

 public static void main(String args[]) {
   JFrame frame = new JFrame("Mnemonic/Accelerator Sample");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   final Action printAction = new PrintHelloAction();
   JMenuBar menuBar = new JMenuBar();
   JMenu menu = new JMenu("File");
   menuBar.add(menu);
   JMenuItem menuItem = new JMenuItem("Print");
   KeyStroke ctrlP = KeyStroke.getKeyStroke(KeyEvent.VK_P,
       InputEvent.CTRL_MASK);
   menuItem.setAccelerator(ctrlP);
   menuItem.addActionListener(printAction);
   menu.add(menuItem);
   JButton fileButton = new JButton("About");
   fileButton.setMnemonic(KeyEvent.VK_A);
   fileButton.addActionListener(printAction);
   frame.setJMenuBar(menuBar);
   frame.add(fileButton, BorderLayout.SOUTH);
   frame.setSize(300, 100);
   frame.setVisible(true);
 }

} class PrintHelloAction extends AbstractAction {

 private static final Icon printIcon = new MyIcon();
 PrintHelloAction() {
   super("Print", printIcon);
   putValue(Action.SHORT_DESCRIPTION, "Hello, World");
 }
 public void actionPerformed(ActionEvent actionEvent) {
   System.out.println("Hello, World");
 }

} class MyIcon implements Icon {

 public int getIconWidth() {
   return 32;
 }
 public int getIconHeight() {
   return 32;
 }
 public void paintIcon(Component c, Graphics g, int x, int y) {
   g.drawString("jexp.ru", 0, 20);
 }

}

 </source>
   
  
 
  

JMenuItem: setMnemonic(char mnemonic)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.event.ActionEvent; import javax.swing.AbstractAction; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JTextPane; import javax.swing.border.BevelBorder; public class MainClass extends JPanel {

 public JTextPane pane;
 public JMenuBar menuBar;
 public MainClass() {
   menuBar = new JMenuBar();
   JMenu formatMenu = new JMenu("Justify");
   formatMenu.setMnemonic("J");
   MenuAction leftJustifyAction = new MenuAction("Left", new ImageIcon("left.gif"));
   MenuAction rightJustifyAction = new MenuAction("Right", new ImageIcon("right.gif"));
   MenuAction centerJustifyAction = new MenuAction("Center", new ImageIcon("center.gif"));
   MenuAction fullJustifyAction = new MenuAction("Full", new ImageIcon("full.gif"));
   JMenuItem item;
   item = formatMenu.add(leftJustifyAction);
   item.setMnemonic("L");
   item = formatMenu.add(rightJustifyAction);
   item.setMnemonic("R");
   item = formatMenu.add(centerJustifyAction);
   item.setMnemonic("C");
   item = formatMenu.add(fullJustifyAction);
   item.setMnemonic("F");
   menuBar.add(formatMenu);
   menuBar.setBorder(new BevelBorder(BevelBorder.RAISED));
 }
 class MenuAction extends AbstractAction {
   public MenuAction(String text, Icon icon) {
     super(text, icon);
   }
   public void actionPerformed(ActionEvent e) {
     try {
       pane.getStyledDocument().insertString(0,
           "Action [" + e.getActionCommand() + "] performed!\n", null);
     } catch (Exception ex) {
       ex.printStackTrace();
     }
   }
 }
 public static void main(String s[]) {
   MainClass example = new MainClass();
   example.pane = new JTextPane();
   example.pane.setPreferredSize(new Dimension(250, 250));
   example.pane.setBorder(new BevelBorder(BevelBorder.LOWERED));
   JFrame frame = new JFrame("Menu Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setJMenuBar(example.menuBar);
   frame.getContentPane().add(example.pane, BorderLayout.CENTER);
   frame.pack();
   frame.setVisible(true);
 }

}

 </source>
   
  
 
  

new JMenuItem(Action act)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.AbstractAction; import javax.swing.Action; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JPanel; import javax.swing.JToolBar; public class MainClass {

 public static void main(String args[]) {
   JFrame frame = new JFrame("Action Sample");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   final Action printAction = new PrintHelloAction();
   JMenuBar menuBar = new JMenuBar();
   JMenu menu = new JMenu("File");
   menuBar.add(menu);
   menu.add(new JMenuItem(printAction));
   JToolBar toolbar = new JToolBar();
   toolbar.add(new JButton(printAction));
   JButton enableButton = new JButton("Enable");
   ActionListener enableActionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       printAction.setEnabled(true);
     }
   };
   enableButton.addActionListener(enableActionListener);
   JButton disableButton = new JButton("Disable");
   ActionListener disableActionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       printAction.setEnabled(false);
     }
   };
   disableButton.addActionListener(disableActionListener);
   JButton relabelButton = new JButton("Relabel");
   ActionListener relabelActionListener = new ActionListener() {
     public void actionPerformed(ActionEvent actionEvent) {
       printAction.putValue(Action.NAME, "Hello, World");
     }
   };
   relabelButton.addActionListener(relabelActionListener);
   JPanel buttonPanel = new JPanel();
   buttonPanel.add(enableButton);
   buttonPanel.add(disableButton);
   buttonPanel.add(relabelButton);
   frame.setJMenuBar(menuBar);
   frame.add(toolbar, BorderLayout.SOUTH);
   frame.add(buttonPanel, BorderLayout.NORTH);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

} class PrintHelloAction extends AbstractAction {

 PrintHelloAction() {
   super("Print");
   putValue(Action.SHORT_DESCRIPTION, "Hello, World");
 }
 public void actionPerformed(ActionEvent actionEvent) {
   System.out.println("Hello, World");
 }

}

 </source>