JCheckBox – Java Swing – Example

In this tutorial, we are going to see an example of JCheckBox in Java Swing. JCheckBox is a Swing component that represents an element that shows a selected or unselected state. The user can change this state by clicking on the checkbox.

A standard JCheckBox component contains a checkbox and a label that describes the purpose of the checkbox. An icon and a mnemonic key can also be defined for this component.
 

JCheckBox constructors class:

JCheckBox constructors	Description
JCheckBox()	Creates a new checkbox without text or icon.
JCheckBox(Icon i)	Creates a new checkbox with an icon
JCheckBox(Icon icon, boolean s)	Creates a new checkbox with an icon and the boolean value specifies whether it is selected or not.
JCheckBox(String t)	Creates a new checkbox with a string
JCheckBox(String text, boolean selected)	Creates a new checkbox with a string and the boolean value specifies whether it is selected or not.
JCheckBox(String text, Icon icon)	Creates a new checkbox with the specified string and icon.
JCheckBox(String text, Icon icon, boolean selected)	Creates a new checkbox with the specified string and icon and the boolean value specifies whether it is selected or not.

 

 

Commonly used methods:

• setIcon(Icon i): sets the checkbox icon to the given icon
• setText(String s): sets the checkbox text to the given text
• setSelected(boolean b): sets the checkbox if the transmitted boolean value is true or vice versa
• getIcon(): returns the image of the checkbox
• getText(): returns the text of the checkbox
• updateUI(): resets the GUI property to the current Look & Feel value.
• getUI(): returns the Look & Feel object which makes this component.
• paramString(): returns a string representation of this JCheckBox.
• getUIClassID(): gets the AccessibleContext associated with this JCheckBox.
• getAccessibleContext(): gets the AccessibleContext associated with this JCheckBox.
• isBorderPaintedFlat(): gets the value of the borderPaintedFlat property.
• setBorderPaintedFlat(boolean b): sets the borderPaintedFlat property.

 

Example of JCheckBox in Java Swing:

import java.awt.*; 
import javax.swing.*;
 
class Main extends JFrame 
{   
    static JFrame f; 
  
    public static void main(String[] args) 
    { 
        // create a new frame
        f = new JFrame("Checkbox Example"); 
  
        // set  the frame layout
        f.setLayout(new FlowLayout()); 
  
        // create a checkbox
        JCheckBox check1 = new JCheckBox("Male"); 
        JCheckBox check2 = new JCheckBox("Female"); 
  
        // create a new panel
        JPanel p = new JPanel(); 
  
        // add a checkbox to the panel 
        p.add(check1); 
        p.add(check2); 
  
        // add panel to frame 
        f.add(p); 
  
        // set the frame size 
        f.setSize(250, 250); 
        f.show(); 
    } 
}

Output:

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