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AWT Menu Class
Introduction
The Menu class represents pull-down menu component which is deployed from a menu bar.
Class declaration
Following is the declaration for java.awt.Menu class:
public class Menu extends MenuItem implements MenuContainer, Accessible
Class constructors
S.N. | Constructor & Description |
---|---|
1 | Menu() Constructs a new menu with an empty label. |
2 | Menu(String label) Constructs a new menu with the specified label. |
3 | Menu(String label, boolean tearOff) Constructs a new menu with the specified label, indicating whether the menu can be torn off. |
Class methods
S.N. | Method & Description |
---|---|
1 | MenuItem add(MenuItem mi) Adds the specified menu item to this menu. |
2 | void add(String label) Adds an item with the specified label to this menu. |
3 | void addNotify() Creates the menu's peer. |
4 | void addSeparator() Adds a separator line, or a hypen, to the menu at the current position. |
5 | int countItems() Deprecated. As of JDK version 1.1, replaced by getItemCount(). |
6 | AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this Menu. |
7 | MenuItem getItem(int index) Gets the item located at the specified index of this menu. |
8 | int getItemCount() Get the number of items in this menu. |
9 | void insert(MenuItem menuitem, int index) Inserts a menu item into this menu at the specified position. |
10 | void insert(String label, int index) Inserts a menu item with the specified label into this menu at the specified position. |
11 | void insertSeparator(int index) Inserts a separator at the specified position. |
12 | boolean isTearOff() Indicates whether this menu is a tear-off menu. |
13 | String paramString() Returns a string representing the state of this Menu. |
14 | void remove(int index) Removes the menu item at the specified index from this menu. |
15 | void remove(MenuComponent item) Removes the specified menu item from this menu. |
16 | void removeAll() Removes all items from this menu. |
17 | void removeNotify() Removes the menu's peer. |
Methods inherited
This class inherits methods from the following classes:
java.awt.MenuItem
java.awt.MenuComponent
java.lang.Object
Menu 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.)