JTextField Font Change

package weekTwo;

import javax.swing.*;
import java.awt.*;
import java.awt.GridBagConstraints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TaskTwo {

    public static void main(String[] args) {
        JFrame window = new JFrame("Font Chooser");
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setSize(500, 100);

        Container pane = window.getContentPane();
        pane.setLayout(new GridBagLayout());

        GridBagConstraints gbc = new GridBagConstraints();

        JTextField text = new JTextField();
        gbc.gridx = 2;
        gbc.gridy = 2;
        gbc.weightx = 1;
        gbc.weighty = 1;
        gbc.insets = new Insets(0, 0, 5, 5); //padding constraints
        gbc.fill = GridBagConstraints.BOTH;   //text field fills cell
        pane.add(text, gbc);

        FontSetter fontSetter = new FontSetter(text);

        JCheckBox bold = new JCheckBox("Bold");
        gbc.gridx = 0; //sets x position to 0
        gbc.gridy = 1;
        bold.addActionListener(new Bold(fontSetter, text));
        pane.add(bold, gbc);

        JCheckBox italic = new JCheckBox("Italic");
        gbc.gridx = 0;
        gbc.gridy = 3;
        italic.addActionListener(new Italic(fontSetter, text));
        pane.add(italic, gbc);

        JRadioButton times = new JRadioButton("Times", true);
        gbc.gridx = 1;
        gbc.gridy = 0;
        times.addActionListener(new Times(fontSetter, text));
        pane.add(times, gbc);

        JRadioButton helvetica = new JRadioButton("Helvetica", false);
        gbc.gridx = 1;
        gbc.gridy = 2;
        helvetica.addActionListener(new Helvetica(fontSetter, text));
        pane.add(helvetica, gbc);

        JRadioButton courier = new JRadioButton("Courier", false);
        gbc.gridx = 1;
        gbc.gridy = 4;
        courier.addActionListener(new Courier(fontSetter, text));
        pane.add(courier, gbc);

        ButtonGroup fonts = new ButtonGroup();  //now only one of these buttons can be selected at once
        fonts.add(times);
        fonts.add(helvetica);
        fonts.add(courier);

        JButton ok = new JButton("OK");
        gbc.gridx = 3;
        gbc.gridy = 2;
        //ok.addActionListener();
        pane.add(ok, gbc);

        window.setVisible(true);
    }
}

class Bold implements ActionListener {

    private final FontSetter fontSetter;
    private final JTextField textfield;

    Bold(FontSetter fontSetter, JTextField textfield) {
        this.fontSetter = fontSetter;
        this.textfield = textfield;
    }


    @Override
    public void actionPerformed(ActionEvent e) {
        JCheckBox ch = (JCheckBox) e.getSource();
        fontSetter.setBold(ch.isSelected());
    }

}

class Italic implements ActionListener {

    private final FontSetter fontSetter;
    private final JTextField textfield;

    Italic(FontSetter fontSetter, JTextField textfield) {
        this.fontSetter = fontSetter;
        this.textfield = textfield;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        JCheckBox ch = (JCheckBox) e.getSource();
        fontSetter.setItalic(ch.isSelected());
    }

}

class Times implements ActionListener {

    private final FontSetter fontSetter;
    private final JTextField textfield;

    Times(FontSetter fontSetter, JTextField textfield) {
        this.fontSetter = fontSetter;
        this.textfield = textfield;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        fontSetter.setFontName("Helvetica");
        textfield.setText("Times");
    }

}

class Helvetica implements ActionListener {

    private final FontSetter fontSetter;
    private final JTextField textfield;

    Helvetica(FontSetter fontSetter, JTextField textfield) {
        this.fontSetter = fontSetter;
        this.textfield = textfield;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        fontSetter.setFontName("Helvetica");
        textfield.setText("Helvetica");
    }

}

class Courier implements ActionListener {

    private final FontSetter fontSetter;
    private final JTextField textfield;

    Courier(FontSetter fontSetter, JTextField textfield) {
        this.fontSetter = fontSetter;
        this.textfield = textfield;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        fontSetter.setFontName("Courier");
        textfield.setText("Courier");
    }

}

class FontSetter {

    private final JTextField text;
    private String fontName = "Times";
    private boolean isBold = false;
    private boolean isItalic = false;

    FontSetter(JTextField text) {
        this.text = text;
    }

    void setBold(boolean flag) {
        isBold = flag;
        applyFontChanges();
    }

    void setItalic(boolean flag) {
        isItalic = flag;
        applyFontChanges();
    }

    void setFontName(String fontName) {
        this.fontName = fontName;
        applyFontChanges();
    }

    private void applyFontChanges(){
        Font font;
        int style;

        if(isBold && isItalic){
            style = Font.BOLD + Font.ITALIC;
        } else if(isBold){
            style = Font.BOLD;
        } else if(isItalic){
            style = Font.ITALIC;
        } else {
            style = Font.PLAIN;
        }

        font = new Font(fontName, style, 12);
        text.setFont(font );
    }

}