Java Programming Tutorial - 67 - JRadioButton Final Program

package apples;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Gui extends JFrame {

private JTextField tf;

private Font pf;

private Font bf;

private Font itf;

private Font bif;

private JRadioButton pb;

private JRadioButton bb;

private JRadioButton ib;

private JRadioButton bib;

private ButtonGroup group; 

public Gui() {

 super ("the title");

 setLayout(new FlowLayout());

 tf = new JTextField ("Thileban is awesome and hot", 25);

 add(tf);

 pb = new JRadioButton("plain", true); 

 bb = new JRadioButton("bold", false); 

 ib = new JRadioButton("italic", false); 

 bib = new JRadioButton("bold and italic", false); 

 add(pb);

 add(bb);

 add(ib);

 add(bib);

 group = new ButtonGroup();

 group.add(pb);

 group.add(bb);

 group.add(ib);

 group.add(bib);

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

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

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

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

 tf.setFont(pf);

 //wait for event to happen, pass in font object to constructor

 pb.addItemListener(new HandlerClass(pf));

 bb.addItemListener(new HandlerClass(bf));

 ib.addItemListener(new HandlerClass(itf));

 bib.addItemListener(new HandlerClass(bif));

 }

private class HandlerClass implements ItemListener{

private Font font;

//the font object get variable font

public HandlerClass(Font f) {

font = f;

}

//sets the font to font object that was passed in

public void itemStateChanged(ItemEvent event) {

tf.setFont(font);

}

}

 }