java swing

Java code:
package Test;

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class CalcTest extends JFrame{
JTextField jtf;
JPanel MemuPanel,TextPanel;
JMenuBar jmb;
JMenu bjM,ckM,bzM;
JMenuItem copyM,pasteM,closeM,helpM,gyM;

public CalcTest(){
Container c = getContentPane();
MemuPanel = new JPanel();

jmb = new JMenuBar();

bjM = new JMenu("±à¼­(E)");
ckM = new JMenu("²é¿´(V)");
bzM = new JMenu("°ïÖú(H)");

copyM = new JMenuItem("¸´ÖÆ(C)");
pasteM = new JMenuItem("Õ³Ìù(V)");
closeM = new JMenuItem("¹Ø±Õ(E)");
helpM = new JMenuItem("°ïÖúÖ÷Ìâ");
gyM = new JMenuItem("¹ØÓÚ¼ÆËãÆ÷");
bjM.add(copyM);
bjM.add(pasteM);
ckM.add(closeM);
bzM.add(helpM);
bzM.add(gyM);
jmb.add(bjM);
jmb.add(ckM);
jmb.add(bzM);


MemuPanel.add(jmb);


//TextPanel = new JPanel();
jtf = new JTextField(35);
//TextPanel.add