CheckboxGroupExample.java

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 [] agrs){
new CheckboxGroupExample();
}
}