JCheckbox
Create Checked/Unchecked JCheckBox
With this example we shall show you how to create JCheckBoxes
in a Java Desktop Application. Checkboxes are very commonly used when we provide the user with a list of choices and we want him to pick as many as he wishes.
To create a Checked/Unchecked JCheckBox
you have to:
- Create a number of
JCheckBoxes
. - Use
setSelected
method to set a check box checked by default. Otherwise the check box will be unchecked. - Use
add
method to add the checkboxes to the frame.
Let’s see the code snippet that follows:
package com.javacodegeeks.snippets.desktop; import java.awt.FlowLayout; import javax.swing.JCheckBox; import javax.swing.JFrame; public class CreateCheckedUncheckedJCheckBox extends JFrame { private static final long serialVersionUID = 1L; public CreateCheckedUncheckedJCheckBox() { // set flow layout for the frame this.getContentPane().setLayout(new FlowLayout()); JCheckBox checkBox1 = new JCheckBox("Checkbox 1"); checkBox1.setSelected(true); JCheckBox checkBox2 = new JCheckBox("Checkbox 2", true); JCheckBox checkBox3 = new JCheckBox("Checkbox 3"); // add checkboxes to frame add(checkBox1); add(checkBox2); add(checkBox3); } private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new CreateCheckedUncheckedJCheckBox(); //Display the window. frame.pack(); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }
This was an example on how to create Checked/Unchecked JCheckBoxes in Java.