Java AWT CheckboxGroup

The object of CheckboxGroup class is used to group together a set of Checkbox. At a time only one check box button is allowed to be in "on" state and remaining check box button in "off" state. It inherits the object class.

Note: CheckboxGroup enables you to create radio buttons in AWT. There is no special control for creating radio buttons in AWT.

AWT CheckboxGroup Class Declaration

Java AWT CheckboxGroup Example

import java.awt.*;  
public class CheckboxGroupExample  
{  
       CheckboxGroupExample(){  
       Frame f= new Frame("CheckboxGroup Example");  
        CheckboxGroup cbg = new CheckboxGroup();
        Checkbox checkBox1 = new Checkbox("C++", cbg, false);  
        checkBox1.setBounds(100,100, 50,50);  
        Checkbox checkBox2 = new Checkbox("Java", cbg, true);  
        checkBox2.setBounds(100,150, 50,50);  
        f.add(checkBox1);  
        f.add(checkBox2);  
        f.setSize(400,400);  
        f.setLayout(null);  
        f.setVisible(true);  
     }  
public static void main(String args[])  
{  
    new CheckboxGroupExample();  
}  
}

Output:

Java AWT CheckboxGroup Example with ItemListener

import java.awt.*;  
import java.awt.event.*;
public class CheckboxGroupExample  
{  
     CheckboxGroupExample(){  
       Frame f= new Frame("CheckboxGroup Example");  
       final Label label = new Label();        
       label.setAlignment(Label.CENTER);
       label.setSize(400,100);
        CheckboxGroup cbg = new CheckboxGroup();
        Checkbox checkBox1 = new Checkbox("C++", cbg, false);  
        checkBox1.setBounds(100,100, 50,50);  
        Checkbox checkBox2 = new Checkbox("Java", cbg, false);  
        checkBox2.setBounds(100,150, 50,50);  
        f.add(checkBox1); f.add(checkBox2); f.add(label);  
        f.setSize(400,400);  
        f.setLayout(null);  
        f.setVisible(true);  
        checkBox1.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {             
               label.setText("C++ checkbox: Checked");
            }
         });
        checkBox2.addItemListener(new ItemListener() {
            public void itemStateChanged(ItemEvent e) {             
               label.setText("Java checkbox: Checked");
            }
         });
     }  
public static void main(String args[])  
{  
    new CheckboxGroupExample();  
}  
}

Output: