popupMenu显示问题

Question

我再JTextArea对象中加入了一个popupMenu菜单，可是点击右键不能显示，请问如何让该popupMenu显示出来呢？

Answer 1

package jsp;import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.*;public class Frame1 extends JFrame {
    JPanel contentPane;
    BorderLayout borderLayout1 = new BorderLayout();
    JTextArea text=new JTextArea();
    JPopupMenu menu=new JPopupMenu();
    JMenuItem jmenu=new JMenuItem("hide");
    
    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(borderLayout1);
        setSize(new Dimension(400, 300));
        setTitle("Frame Title");
        this.add(text,borderLayout1.CENTER);
        menu.add(jmenu);
        
        text.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent e)
            {
                if (e.getButton()==MouseEvent.BUTTON3)
                {
                    menu.show(text,e.getX(),e.getY());
                }else{
                    menu.setVisible(false);
                }
            }
        });
    }
    
    public static void main(String[] args)
    {
        new Frame1().setVisible(true);
    }
}

Answer 2

谢谢了，可是好像有点问题啊，就是在menu.show(text,e.getX(),e.getY())地方抛出异常，怎么回事呢？