import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JCheckBox;

public class CheckBoxFrame extends JFrame {
    private JTextField textField;
    private JCheckBox boldJCheckBox;
    private JCheckBox italicJCheckBox;

    public CheckBoxFrame(){
        super ("JCheckBox Test");
        setLayout(new FlowLayout() );


        textField = new JTextField("Wath the font style change", 20);
        textField.setFont( new Font("Serif", Font.PLAIN, 14));
        add(textField);

        boldJCheckBox = new JCheckBox("Bold");
        italicJCheckBox = new JCheckBox("Italic");
        add(boldJCheckBox);
        add(italicJCheckBox);

        CheckBoxHandler handler = new CheckBoxHandler();
        boldJCheckBox.addItemListener(handler);
        italicJCheckBox.addItemListener(handler);

     }
        private class CheckBoxHandler implements ItemListener{
         public void itemStateChanged( ItemEvent envent){
         Font font = null;

         if (boldJCheckBox.isSelected() && italicJCheckBox.isSelected())
             font = new Font ("Serif", Font.BOLD + Font.ITALIC, 14);
         else if (boldJCheckBox.isSelected())
             font = new Font("Serif",Font.BOLD, 14);
         else if (italicJCheckBox.isSelected())
             font = new Font("Serif", Font.ITALIC, 14);
         else
             font = new Font("Serf", Font.PLAIN, 14);

         textField.setFont(font);




         }
        }
    }