下面程序增加什么代码后才会有弹出式菜单?
帮我改一下程序吧!谢谢!!!!!
package ygp;
import java.applet.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
public class Frame1 extends JFrame {
JPanel contentPane;
JMenuBar jMenuBar1 = new JMenuBar();
JMenu jMenu1 = new JMenu();
JMenu jMenu2 = new JMenu();
JMenuItem jMenuItem1 = new JMenuItem();
JMenuItem j1 = new JMenuItem();
JMenuItem jMenuItem3 = new JMenuItem();
JMenuItem jMenuItem4 = new JMenuItem();
JTextArea t1 = new JTextArea();
JScrollPane tools=new JScrollPane(t1);
JMenuBar jMenuBar2 = new JMenuBar();
GridBagLayout gridBagLayout1 = new GridBagLayout();
JMenuBar jMenuBar3 = new JMenuBar();
Button button1 = new Button();
public Frame1() {
try {
setDefaultCloseOperation(EXIT_ON_CLOSE);
jbInit();
} catch (Exception exception) {
exception.printStackTrace();
}
}
/**
* Component initialization.
*
* @throws java.lang.Exception
*/
private void jbInit() throws Exception {
contentPane = (JPanel) getContentPane();
contentPane.setLayout(gridBagLayout1);
this.setJMenuBar(jMenuBar1);
setSize(new Dimension(400, 300));
setTitle( "编辑器 ");
jMenu1.setText( "文件 ");
jMenu2.setText( "编辑 ");
j1.setText( "打开 ");
j1.addActionListener(new Frame1_jMenuItem2_actionAdapter(this));
jMenuItem1.setText( "退出 ");