求助--左键点击控件出现弹出菜单

Question

怎样做到左键点击控件出现弹出菜单

Answer 1

在鼠标事件里面用JPopupMenu实现菜单显示.

Answer 2

package com.sysdynamic.test;import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;import javax.swing.JButton;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;import javax.swing.WindowConstants;
import javax.swing.SwingUtilities;public class EventTest extends javax.swing.JFrame {
private JPanel MainJPanel;
private JButton btnName;
private JButton btnAge;
private JButton btnSex; public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
EventTest inst = new EventTest();
inst.setLocationRelativeTo(null);
inst.setVisible(true);
}
});
} public EventTest() {
super();
initGUI();
} private void initGUI() {
try {
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); MainJPanel = new JPanel();
getContentPane().add(MainJPanel, BorderLayout.CENTER); btnName = new JButton();
MainJPanel.add(btnName);
btnName.setText("Name");

btnName.setToolTipText("右击我弹出菜单!"); btnName.addMouseListener(new MyMouseListener(btnName));  //右击菜单 btnSex = new JButton();
MainJPanel.add(btnSex);
btnSex.setText("Sex"); btnAge = new JButton();
MainJPanel.add(btnAge);
btnAge.setText("Age"); btnAge.addActionListener(new myActionListener(btnAge));
btnName.addActionListener(new myActionListener(btnName));
btnSex.addActionListener(new myActionListener(btnSex)); pack();
setSize(400, 300);
} catch (Exception e) {
e.printStackTrace();
}
}}//右击菜单
class MyMouseListener implements MouseListener { Component component;

public MyMouseListener(){

}
public MyMouseListener(Component component) {
this.component = component;
}

@Override
public void mouseClicked(MouseEvent e) { if(e.getButton()==3){
JPopupMenu jPopupMenu=new JPopupMenu();
JMenuItem add=new JMenuItem("Add");
JMenuItem update=new JMenuItem("Update");
JMenuItem delete=new JMenuItem("Delete");
JMenuItem query=new JMenuItem("Query");
jPopupMenu.add(add);
jPopupMenu.add(update);
jPopupMenu.add(delete);
jPopupMenu.add(query);
jPopupMenu.show(component, e.getX(), e.getY());
}

} @Override
public void mouseEntered(MouseEvent e) { } @Override
public void mouseExited(MouseEvent e) { } @Override
public void mousePressed(MouseEvent e) { } @Override
public void mouseReleased(MouseEvent e) { }}class myActionListener implements ActionListener { Component component; public myActionListener() { } public myActionListener(Component component) {
this.component = component;
} public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(null, ((JButton) component).getText()
.toString());
}}

Answer 3

问题已经解决了 谢谢大家的关注 如果有疑问的该我留言吧 大家一起讨论啊bfunction.addMouseListener(new MouseAdapter()
        {
    //private JPopupMenu popup = new JPopupMenu();
            public void MouseClicked(MouseEvent e)
            {
                add(popup);//添加弹出菜单
                showPopup(e);
            }            public void mousePressed(MouseEvent e)
            {
                showPopup(e);
            }            public void mouseClicked(MouseEvent e)
            {
                showPopup(e);
            }            public void mouseReleased(MouseEvent e)
            {
                showPopup(e);
            }            public void showPopup(MouseEvent e6)
            {
             //设定菜单项的显示方式
        });