Java Programming Tutorial - 65 - The Final Check Box Program

package apples;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Gui extends JFrame {

private JTextField tf;

private JCheckBox boldbox;

private JCheckBox italicbox;

public Gui() {

super("the title");

setLayout(new FlowLayout());

tf=new JTextField("This is a sentence",20);

tf.setFont(new Font("Serif", Font.PLAIN,14));

add(tf);

boldbox = new JCheckBox("bold");

italicbox = new JCheckBox ("italic");

add(boldbox);

add(italicbox);

HandlerClass handler = new HandlerClass();

boldbox.addItemListener(handler);

italicbox.addItemListener(handler);

}

private class HandlerClass implements ItemListener {

public void itemStateChanged (ItemEvent event) {

Font font = null ;

if(boldbox.isSelected() && italicbox.isSelected())

font = new Font("Serif", Font.BOLD + Font.ITALIC, 14);

else if (boldbox.isSelected())

font = new Font("Serif", Font.BOLD, 14);

else if (italicbox.isSelected())

font = new Font("Serif", Font.ITALIC, 14);

else

font = new Font ("Serif", Font.PLAIN, 14);

tf.setFont(font);

}

}

}

package apples;

import javax.swing.JFrame;

public class apples  {

public static void main (String[] args) {

Gui go = new Gui();

go.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

go.setSize(300, 200);

go.setVisible(true);

} 

 }