AWT(CheckBox Using JFrame)

// Creating Checkbox buttons.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CheckBoxTest extends JFrame {
private JTextField t;
private JCheckBox bold, italic;

public CheckBoxTest()
{
super( "JCheckBox Test" );

Container c = getContentPane();
c.setLayout(new FlowLayout());

t = new JTextField( "Watch the font style change", 20 );
t.setFont( new Font( "TimesRoman", Font.PLAIN, 14 ) );
c.add( t );

// create checkbox objects
bold = new JCheckBox( "Bold" );
c.add( bold );

italic = new JCheckBox( "Italic" );
c.add( italic );

CheckBoxHandler handler = new CheckBoxHandler();
bold.addItemListener( handler );
italic.addItemListener( handler );

addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e )
{
System.exit( 0 );
}
}
);

setSize( 275, 100 );
show();
}

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

private class CheckBoxHandler implements ItemListener {
private int valBold = Font.PLAIN;
private int valItalic = Font.PLAIN;
public void itemStateChanged( ItemEvent e )
{
if ( e.getSource() == bold )
if ( e.getStateChange() == ItemEvent.SELECTED )
valBold = Font.BOLD;
else
valBold = Font.PLAIN;

if ( e.getSource() == italic )
if ( e.getStateChange() == ItemEvent.SELECTED )
valItalic = Font.ITALIC;
else
valItalic = Font.PLAIN;

t.setFont(
new Font( "TimesRoman", valBold + valItalic, 14 ) );
t.repaint();
}
}
}