java - JCheckbox example

package JCheckbox_GUI;

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class JCheckbox_gui extends JFrame implements ItemListener, ActionListener{

    
    JTextField txtext;
    JCheckBox jcbBolb, jcbItalic;
    public JCheckbox_gui() {
        // TODO Auto-generated constructor stub
        
        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        
        p1.add(txtext = new JTextField(20));
        p2.add(jcbBolb = new JCheckBox("Bold"));
        p2.add(jcbItalic = new JCheckBox("Italic"));
        add(p1, BorderLayout.CENTER);
        add(p2, BorderLayout.SOUTH);
        jcbBolb.addItemListener(this);
        jcbItalic.addItemListener(this);
        
        
        /***/
        
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(420, 100);
        setLocationRelativeTo(null);
    }
    @Override
    public void actionPerformed(ActionEvent e) {
    
        
    }
    @Override
    public void itemStateChanged(ItemEvent e) {
        Font t = txtext.getFont();
        JCheckBox cb = (JCheckBox) e.getItem();
        if(e.getStateChange()==ItemEvent.SELECTED)
        {
            System.out.println("Selected");
        }
        else
        {
            System.out.println("not selected");
            txtext.setFont(new Font(t.getName(), Font.PLAIN, t.getSize()));
        }
        
        if(jcbBolb.isSelected())
        {
            txtext.setFont(new Font(t.getName(), Font.BOLD, t.getSize()));
        }
        if(jcbItalic.isSelected())
        {
            txtext.setFont(new Font(t.getName(), Font.ITALIC, t.getSize()));
        }
        if(jcbItalic.isSelected()&&jcbBolb.isSelected())
        {
            System.out.println("Both");
            txtext.setFont(new Font(t.getName(), Font.ITALIC+Font.BOLD, t.getSize()));
        }
        
    }
    
    public static void main(String[] args) {
        
        new JCheckbox_gui();
    }
}