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AWT MenuItem Class
Introduction
The MenuBar class represents the actual item in a menu. All items in a menu should derive from class MenuItem, or one of its subclasses. By default, it embodies a simple labeled menu item.
Class declaration
Following is the declaration for java.awt.MenuItem class:
public class MenuItem extends MenuComponent implements Accessible
Class constructors
S.N. | Constructor & Description |
---|---|
1 | MenuItem() Constructs a new MenuItem with an empty label and no keyboard shortcut. |
2 | MenuItem(String label) Constructs a new MenuItem with the specified label and no keyboard shortcut. |
3 | MenuItem(String label, MenuShortcut s) Create a menu item with an associated keyboard shortcut. |
Class methods
S.N. | Method & Description |
---|---|
1 | void addActionListener(ActionListener l) Adds the specified action listener to receive action events from this menu item. |
2 | void addNotify() Creates the menu item's peer. |
3 | void deleteShortcut() Delete any MenuShortcut object associated with this menu item. |
4 | void disable() Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean). |
5 | protected void disableEvents(long eventsToDisable) Disables event delivery to this menu item for events defined by the specified event mask parameter. |
6 | void enable() Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean). |
7 | void enable(boolean b) Deprecated. As of JDK version 1.1, replaced by setEnabled(boolean). |
8 | protected void enableEvents(long eventsToEnable) Enables event delivery to this menu item for events to be defined by the specified event mask parameter. |
9 | AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this MenuItem. |
10 | String getActionCommand() Gets the command name of the action event that is fired by this menu item. |
11 | ActionListener[] getActionListeners() Returns an array of all the action listeners registered on this menu item. |
12 | String getLabel() Gets the label for this menu item. |
13 | EventListener[] getListeners(Class listenerType) Returns an array of all the objects currently registered as FooListeners upon this MenuItem. |
14 | MenuShortcut getShortcut() Get the MenuShortcut object associated with this menu item. |
15 | boolean isEnabled() Checks whether this menu item is enabled. |
16 | String paramString() Returns a string representing the state of this MenuItem. |
17 | protected void processActionEvent(ActionEvent e) Processes action events occurring on this menu item, by dispatching them to any registered ActionListener objects. |
18 | protected void processEvent(AWTEvent e) Processes events on this menu item. |
19 | void removeActionListener(ActionListener l) Removes the specified action listener so it no longer receives action events from this menu item. |
20 | void setActionCommand(String command) Sets the command name of the action event that is fired by this menu item. |
21 | void setEnabled(boolean b) Sets whether or not this menu item can be chosen. |
22 | void setLabel(String label) Sets the label for this menu item to the specified label. |
23 | void setShortcut(MenuShortcut s) Set the MenuShortcut object associated with this menu item. |
Methods inherited
This class inherits methods from the following classes:
java.awt.MenuComponent
java.lang.Object
MenuItem Example
Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >
AWTMenuDemo.javapackage com.tutorialspoint.gui; import java.awt.*; import java.awt.event.*; public class AWTMenuDemo { private Frame mainFrame; private Label headerLabel; private Label statusLabel; private Panel controlPanel; public AWTMenuDemo(){ prepareGUI(); } public static void main(String[] args){ AWTMenuDemo awtMenuDemo = new AWTMenuDemo(); awtMenuDemo.showMenuDemo(); } private void prepareGUI(){ mainFrame = new Frame("Java AWT Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new Label(); headerLabel.setAlignment(Label.CENTER); statusLabel = new Label(); statusLabel.setAlignment(Label.CENTER); statusLabel.setSize(350,100); controlPanel = new Panel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showMenuDemo(){ //create a menu bar final MenuBar menuBar = new MenuBar(); //create menus Menu fileMenu = new Menu("File"); Menu editMenu = new Menu("Edit"); final Menu aboutMenu = new Menu("About"); //create menu items MenuItem newMenuItem = new MenuItem("New",new MenuShortcut(KeyEvent.VK_N)); newMenuItem.setActionCommand("New"); MenuItem openMenuItem = new MenuItem("Open"); openMenuItem.setActionCommand("Open"); MenuItem saveMenuItem = new MenuItem("Save"); saveMenuItem.setActionCommand("Save"); MenuItem exitMenuItem = new MenuItem("Exit"); exitMenuItem.setActionCommand("Exit"); MenuItem cutMenuItem = new MenuItem("Cut"); cutMenuItem.setActionCommand("Cut"); MenuItem copyMenuItem = new MenuItem("Copy"); copyMenuItem.setActionCommand("Copy"); MenuItem pasteMenuItem = new MenuItem("Paste"); pasteMenuItem.setActionCommand("Paste"); MenuItemListener menuItemListener = new MenuItemListener(); newMenuItem.addActionListener(menuItemListener); openMenuItem.addActionListener(menuItemListener); saveMenuItem.addActionListener(menuItemListener); exitMenuItem.addActionListener(menuItemListener); cutMenuItem.addActionListener(menuItemListener); copyMenuItem.addActionListener(menuItemListener); pasteMenuItem.addActionListener(menuItemListener); final CheckboxMenuItem showWindowMenu = new CheckboxMenuItem("Show About", true); showWindowMenu.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if(showWindowMenu.getState()){ menuBar.add(aboutMenu); }else{ menuBar.remove(aboutMenu); } } }); //add menu items to menus fileMenu.add(newMenuItem); fileMenu.add(openMenuItem); fileMenu.add(saveMenuItem); fileMenu.addSeparator(); fileMenu.add(showWindowMenu); fileMenu.addSeparator(); fileMenu.add(exitMenuItem); editMenu.add(cutMenuItem); editMenu.add(copyMenuItem); editMenu.add(pasteMenuItem); //add menu to menubar menuBar.add(fileMenu); menuBar.add(editMenu); menuBar.add(aboutMenu); //add menubar to the frame mainFrame.setMenuBar(menuBar); mainFrame.setVisible(true); } class MenuItemListener implements ActionListener { public void actionPerformed(ActionEvent e) { statusLabel.setText(e.getActionCommand() + " MenuItem clicked."); } } }
Compile the program using command prompt. Go to D:/ > AWT and type the following command.
D:\AWT>javac com\tutorialspoint\gui\AWTMenuDemo.java
If no error comes that means compilation is successful. Run the program using following command.
D:\AWT>java com.tutorialspoint.gui.AWTMenuDemo
Verify the following output. (Click on File Menu. Select any menu item.)
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