package radiobuttontest;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.*;
import javax.swing.*;

public class RadioButtonFrame extends JFrame {

	private JTextField textField;
	private Font plainFont;
	private Font boldFont;
	private Font italicFont;
	private Font boldItalicFont;
	private JRadioButton plainJRadioButton;
	private JRadioButton boldJRadioButton;
	private JRadioButton italicJRadioButton;
	private JRadioButton boldItalicJRadioButton;
	private ButtonGroup radioGroup;

        public RadioButtonFrame() {
            super("RadioButton Test");
            setLayout( new FlowLayout() );

            textField = new JTextField("Watch the font style change", 25);
            add(textField);

            plainJRadioButton = new JRadioButton("Plain", true);
            boldJRadioButton = new JRadioButton("Bold", false);
            italicJRadioButton = new JRadioButton("Italic", false);
            boldItalicJRadioButton = new JRadioButton("Bold/Italic", false);
            add(plainJRadioButton);
            add(boldJRadioButton);
            add(italicJRadioButton);
            add(boldItalicJRadioButton);

            radioGroup = new ButtonGroup();
            radioGroup.add(plainJRadioButton);
            radioGroup.add(boldJRadioButton);
            radioGroup.add(italicJRadioButton);
            radioGroup.add(boldItalicJRadioButton);

            plainFont = new Font ("Serif", Font.PLAIN, 14);
            boldFont = new Font ("Serif", Font.BOLD, 14);
            boldItalicFont = new Font ("Serif", Font.ITALIC, 14);
            textField.setFont (plainFont);
            plainJRadioButton.addItemListener( new RadioButtonHandler( plainFont ) );
            boldJRadioButton.addItemListener( new RadioButtonHandler( boldFont ) );
            italicJRadioButton.addItemListener( new RadioButtonHandler( italicFont ) );
            boldItalicJRadioButton.addItemListener( new RadioButtonHandler( boldItalicFont ) );
        }

        private class RadioButtonHandler implements ItemListener {

            private Font font;

            public RadioButtonHandler (Font f){
                font = f;
            }

            public void itemStateChanged(ItemEvent event) {
                textField.setFont(font);
            }
        }
}