Java JCheckBoxMenuItem

JCheckBoxMenuItem class represents checkbox which can be included on a menu . A CheckBoxMenuItem can have text or a graphic icon or both, associated with it. MenuItem can be selected or deselected. MenuItems can be configured and controlled by actions.

Nested class

Modifier and Type	Class	Description
protected class	JCheckBoxMenuItem.AccessibleJCheckBoxMenuItem	This class implements accessibility support for the JcheckBoxMenuItem class.

Constructor

Constructor	Description
JCheckBoxMenuItem()	It creates an initially unselected check box menu item with no set text or icon.
JCheckBoxMenuItem(Action a)	It creates a menu item whose properties are taken from the Action supplied.
JCheckBoxMenuItem(Icon icon)	It creates an initially unselected check box menu item with an icon.
JCheckBoxMenuItem(String text)	It creates an initially unselected check box menu item with text.
JCheckBoxMenuItem(String text, boolean b)	It creates a check box menu item with the specified text and selection state.
JCheckBoxMenuItem(String text, Icon icon)	It creates an initially unselected check box menu item with the specified text and icon.
JCheckBoxMenuItem(String text, Icon icon, boolean b)	It creates a check box menu item with the specified text, icon, and selection state.

Methods

Modifier	Method	Description
AccessibleContext	getAccessibleContext()	It gets the AccessibleContext associated with this JCheckBoxMenuItem.
Object[]	getSelectedObjects()	It returns an array (length 1) containing the check box menu item label or null if the check box is not selected.
boolean	getState()	It returns the selected-state of the item.
String	getUIClassID()	It returns the name of the L&F class that renders this component.
protected String	paramString()	It returns a string representation of this JCheckBoxMenuItem.
void	setState(boolean b)	It sets the selected-state of the item.

Java JCheckBoxMenuItem Example

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 JavaCheckBoxMenuItem {
	public static void main(final String args[]) {
		JFrame frame = new JFrame("Jmenu 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 menuItem1 = new JMenuItem("Open", KeyEvent.VK_N);
		fileMenu.add(menuItem1);

		JCheckBoxMenuItem caseMenuItem = new JCheckBoxMenuItem("Option_1");
		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 = "Value-1";
				} else {
					newLabel = "Value-2";
				}
				aButton.setText(newLabel);
			}
		};

		caseMenuItem.addActionListener(aListener);
		frame.setJMenuBar(menuBar);
		frame.setSize(350, 250);
		frame.setVisible(true);
	}
}

Output: