Java - มีปัญหากับการเลือก JCheckBox แล้วไปแสดงที่ Frame ใหม่

package FrameViews;

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

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;

import Model.Top;



public class SetFrame extends JFrame implements ActionListener,ItemListener {

	JFrame frame = new JFrame();
	JPanel panel = new JPanel();
	JPanel buttonpanel = new JPanel();
	JPanel checkpanel = new JPanel();
	JLabel text = new JLabel();
	JButton startbutton = new JButton("Start");
	JCheckBox ThaiTopC = new JCheckBox();
	JCheckBox LaoTopC = new JCheckBox();
	
	public SetFrame(){
		initUI();
	}
	
	public final void initUI() {
		final JMenuBar menub = new JMenuBar();
		JMenu menu = new JMenu("File");
		JMenu menuinfo = new JMenu("Info");
		JMenu menucreator = new JMenu("Creator");
		menu.setMnemonic(KeyEvent.VK_F);
		JMenuItem menuit = new JMenuItem("Exit");
		menuit.setMnemonic(KeyEvent.VK_E);
		menuit.setToolTipText("Exit application");
		menuit.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				System.exit(0);
        }
	});
	

	menu.add(menuit);
	menub.add(menu);
	menub.add(menuinfo);
	menub.add(menucreator);
	setJMenuBar(menub);
	
	
	ThaiTopC = new JCheckBox("Thai Top");
	ThaiTopC.setMnemonic(KeyEvent.VK_C); 
    ThaiTopC.setSelected(false);
    
	LaoTopC = new JCheckBox("Lao Top");
	LaoTopC.setMnemonic(KeyEvent.VK_C); 
    LaoTopC.setSelected(false);
    
    ThaiTopC.addItemListener(this);
    LaoTopC.addItemListener(this); 
    
    checkpanel.add(ThaiTopC);
    checkpanel.add(LaoTopC);
    
	frame.setSize(1000,700);
	frame.setResizable(false);
	frame.setTitle("Top");
	frame.setLocation(200,20);
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.setVisible(true);
	

		
	text.setText("                        Welcome");
	Font myFont = new Font("Serif", Font.BOLD, 60);
	text.setFont(myFont);
	

	/*Top component = new Top();
	frame.add(component);*/
	
	
	panel.setLayout(new BorderLayout());
	buttonpanel.setLayout(new GridLayout(1,2));
	
	buttonpanel.add(checkpanel);
	buttonpanel.add(startbutton);
	buttonpanel.setBorder(new TitledBorder(new EtchedBorder(),"Option")); 

	
	panel.add(text,BorderLayout.CENTER);
	panel.add(buttonpanel,BorderLayout.SOUTH);
	
	frame.setJMenuBar(menub);
	frame.add(panel);
	       
	
	startbutton.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent event) {
	       TopFrame.createTopFrame();
	        }
		});
	}

public void itemStateChanged(ItemEvent e) {
        
        Object source = e.getItemSelectable();

        if (source == ThaiTopC) {
            System.out.print("thai was click");
        	
        } else if (source == LaoTopC) {
        	System.out.print("lao was click");
            
        } 

        if (e.getStateChange() == ItemEvent.DESELECTED){
        	
        }
        
	}

@Override
public void actionPerformed(ActionEvent e) {
	// TODO Auto-generated method stub
	
	
}
}	

package Model;

import javax.swing.JComponent;
import java.awt.Polygon;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
//import java.awt.geom.Ellipse2D;

public class Top extends JComponent {
	
	public final void paintComponent(Graphics g){
		Graphics g2 = (Graphics2D) g;
		
		Rectangle handbox = new Rectangle(70,0,10,40);
		((Graphics2D) g2).setColor(Color.PINK);
		((Graphics2D) g2).draw(handbox);
		((Graphics2D) g2).fill(handbox);
        
		Rectangle box = new Rectangle(0,40,150,30);
		((Graphics2D) g2).setColor(Color.black);
		((Graphics2D) g2).draw(box);
		((Graphics2D) g2).fill(box);
		
        Rectangle basebox = new Rectangle(70,110,10,50);
		((Graphics2D) g2).setColor(Color.PINK);
		((Graphics2D) g2).draw(basebox);
		((Graphics2D) g2).fill(basebox);
		
		int xPoly[] = {0,150,75};
        int yPoly[] = {70,70,120};
        Polygon poly = new Polygon(xPoly, yPoly, xPoly.length);
        g.setColor(Color.GRAY);
        g.fillPolygon(poly);

	
	}	
	
	
}