Java JCheckBox

Java JCheckBox

JCheckBox class inherits from JToggleButton.It's used to turn a particular option either true or false.

How to Declare JCheckBox  class

[public class JCheckBox extends JToggleButton implements Accessible]

JCheckBox commonly used constructors

Below are commonly used JCheckBox constructor.

• JCheckBox()-creates check box button with no text or icon.
• JCheckBox(String s)-creates check box button with a particular text.
• JCheckBox(String s, boolean selected)-creates checkbox with a string that is selected.
• JCheckBox(Action a)-creates check box where properties are taken from the Action supplied.

JCheckBox methods

• [AccessibleContext getAccessibleContext()]-gets accessible context that is related with check box.
• [protected String paramString()]-returns string representation of check box.

See also:Java JPasswordField

Java JCheckBox Example

[

import javax.swing.JFrame;

import javax.swing.JCheckBox;
public class JCheckBoxExample extends JFrame{

    JCheckBoxExample()
    {
        super("JCheckBox Example");
        JCheckBox box1 = new JCheckBox("Eclipse IDE");
        box1.setBounds(100,100, 100,50);
        JCheckBox box2 = new JCheckBox("NetBeans", true);
        box2.setBounds(100,150, 100,50);
        add(box1);
        add(box2);
        setLocationRelativeTo(null);
        setSize(400,400);
        setLayout(null);
        setVisible(true);

    }
    public static void main(String args[])
    {
        new JCheckBoxExample();
    }

}

]

Output

See also: Java JTextArea

Java JCheckBox Example with ItemListener

[

import javax.swing.JFrame;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
public class JCheckBoxExample extends JFrame{

    JCheckBoxExample()
    {
        super("JCheckBox Example");
        JLabel l = new JLabel("");
        l.setHorizontalAlignment(JLabel.CENTER);
        l.setSize(400,100);
        add(l);
        JCheckBox box1 = new JCheckBox("Eclipse IDE");
        box1.setBounds(100,100, 100,50);

        box1.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                l.setText("Eclipse IDE: "                      

  + (e.getStateChange()==1?"checked":"unchecked"));
            }
        });

        JCheckBox box2 = new JCheckBox("NetBeans", true);
        box2.setBounds(100,150, 100,50);
        box2.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {
                l.setText("NetBeans: "                    

    + (e.getStateChange()==1?"checked":"unchecked"));
            }
        });
        add(box1);
        add(box2);
        setLocationRelativeTo(null);
        setSize(400,400);
        setLayout(null);
        setVisible(true);

    }
    public static void main(String args[])
    {
        new JCheckBoxExample();
    }
}

]

Output

See also: Java JButton