Java Swing Tutorial - Java JCheckBoxMenuItem(String text, boolean b) Constructor

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Syntax

JCheckBoxMenuItem(String text, boolean b) constructor from JCheckBoxMenuItem has the following syntax.

public JCheckBoxMenuItem(String text,     boolean b)

Example

In the following code shows how to use JCheckBoxMenuItem.JCheckBoxMenuItem(String text, boolean b) constructor.

//from  w w w . j ava2  s . c o  m
import java.awt.Event;

import javax.swing.ButtonGroup;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.KeyStroke;

public class Main extends JFrame {

  public Main() {
    setDefaultCloseOperation(EXIT_ON_CLOSE);

    setJMenuBar(menuBar);

    JMenu fileMenu = new JMenu("File");
    JMenu elementMenu = new JMenu("Elements");
    fileMenu.setMnemonic('F');
    elementMenu.setMnemonic('E');

    // Construct the file pull down menu
    newItem = fileMenu.add("New");
    openItem = fileMenu.add("Open");
    closeItem = fileMenu.add("Close");
    fileMenu.addSeparator();
    saveItem = fileMenu.add("Save");
    saveAsItem = fileMenu.add("Save As...");

    JMenu colorMenu = new JMenu("Color");

    fileMenu.addSeparator();
    printItem = fileMenu.add("Print");

    newItem.setAccelerator(KeyStroke.getKeyStroke('N', Event.CTRL_MASK));
    openItem.setAccelerator(KeyStroke.getKeyStroke('O', Event.CTRL_MASK));
    saveItem.setAccelerator(KeyStroke.getKeyStroke('S', Event.CTRL_MASK));
    printItem.setAccelerator(KeyStroke.getKeyStroke('P', Event.CTRL_MASK));

    elementMenu.add(lineItem = new JRadioButtonMenuItem("Line", true));
    elementMenu
        .add(rectangleItem = new JRadioButtonMenuItem("Rectangle", false));
    elementMenu.add(circleItem = new JRadioButtonMenuItem("Circle", false));
    elementMenu.add(curveItem = new JRadioButtonMenuItem("Curve", false));
    ButtonGroup types = new ButtonGroup();
    types.add(lineItem);
    types.add(rectangleItem);
    types.add(circleItem);
    types.add(curveItem);

    lineItem.setAccelerator(KeyStroke.getKeyStroke('L', Event.CTRL_MASK));
    rectangleItem.setAccelerator(KeyStroke.getKeyStroke('E', Event.CTRL_MASK));
    circleItem.setAccelerator(KeyStroke.getKeyStroke('I', Event.CTRL_MASK));
    curveItem.setAccelerator(KeyStroke.getKeyStroke('V', Event.CTRL_MASK));

    elementMenu.addSeparator();

    elementMenu.add(colorMenu); // Add the sub-menu
    colorMenu.add(redItem = new JCheckBoxMenuItem("Red", false));
    colorMenu.add(yellowItem = new JCheckBoxMenuItem("Yellow", false));
    colorMenu.add(greenItem = new JCheckBoxMenuItem("Green", false));
    colorMenu.add(blueItem = new JCheckBoxMenuItem("Blue", true));

    // Add element color accelerators
    redItem.setAccelerator(KeyStroke.getKeyStroke('R', Event.CTRL_MASK));
    yellowItem.setAccelerator(KeyStroke.getKeyStroke('Y', Event.CTRL_MASK));
    greenItem.setAccelerator(KeyStroke.getKeyStroke('G', Event.CTRL_MASK));
    blueItem.setAccelerator(KeyStroke.getKeyStroke('B', Event.CTRL_MASK));

    menuBar.add(fileMenu);
    menuBar.add(elementMenu);
  }

  private JMenuBar menuBar = new JMenuBar();

  // File menu items
  private JMenuItem newItem, openItem, closeItem, saveItem, saveAsItem,
      printItem;

  // Element menu items
  private JRadioButtonMenuItem lineItem, rectangleItem, circleItem, curveItem,
      textItem;

  private JCheckBoxMenuItem redItem, yellowItem, greenItem, blueItem;

  public static void main(String[] args) {
    JFrame aWindow = new Main();
    aWindow.setSize(200,200);
    aWindow.setVisible(true);
  }
}

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