Awt package is used for components and awt. event package is used for action performed. If we want to select only one option we use checkboxes.CheckboxGroup is a set of checkboxes in which we can select only one option(checkbox) . The checkboxes which are set in CheckboxGroup are called “radio buttons”.

AWT Example

import java.awt.*;

import java.awt.event.*;

public class lcdd extends Frame implements ActionListener

{

CheckboxGroup cbb;

Checkbox oo1,ff;

Label l1;

Button oo;

public lcdd()

{

setBackground(Color.pink);

cbb=new CheckboxGroup();

oo1=new Checkbox(“on”,true,cbb);

ff=new Checkbox(“off”,false,cbb);

oo=new Button(“Ok”);

setLayout(null);

l1=new Label(“XCnotes.com”);

l1.setBounds(225,100,100,10);

oo.setBounds(300,500,50,20);

oo1.setBounds(300,450,50,20);

ff.setBounds(370,450,50,20);

add(oo);

add(l1);

add(oo1);

add(ff);

oo.addActionListener(this);

}

public void actionPerformed(ActionEvent eh)//click event on button

{

if(eh.getSource()==oo)//when we click on this button the repaint() called

{

repaint();

}}

public void paint(Graphics gl)

{

if(oo1.getState())

{

gl.drawRect(100,100,300,200);

gl.fillRect(100,100,300,200);

Image piic=Toolkit.getDefaultToolkit().getImage(“awt.jpg”);//pic displayed in the lcd

gl.drawImage(piic,110,110,280,180,this); //draw the image

gl.fillRect(230,300,30,50);

gl.fillOval(170,330,150,100);

}

else

{

gl.drawRect(100,100,300,200);

gl.fillRect(100,100,300,200);

gl.fillRect(230,300,30,50);

gl.fillOval(170,330,150,100);

}

}

public static void main(String aa[])

{

lcdd lc=new lcdd();//lc is the object of class lcdd

lc.setSize(300,300); //we can set the size of the frame by using setSize()

lc.setVisible(true);

lc.addWindowListener(new WindowAdapter()   //for window closing

{

public void windowClosing(WindowEvent ew)  //when we click on close then this event perform

{

System.exit(0); //for closing

}

});

}

}

Explanation…

In the above example when we select on the checkbox and click on button then the image will be shown and when we select off checkbox and click on button then the image will not show (like switch on and off)