方法一：
import java.awt.FlowLayout;
import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import javax.swing.*;
public class JPopupMenuTest extends JFrame {
public JPopupMenuTest() { JButton button = new JButton("登录"); this.add(button); //为按钮添加单击事件 button.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { System.out.println("按到了"); } }); final String id= button.getText(); //为按钮创建一个右键菜单 JPopupMenu pop = new JPopupMenu(id); JMenuItem item1 = new JMenuItem("功能1"); item1.addMouseListener(new MouseAdapter(){ public void mouseReleased(MouseEvent e) { System.out.println(id);//输出按钮的文本 } }); pop.add(item1); button.setComponentPopupMenu(pop);//将按钮与右键菜单关联 this.setLayout(new FlowLayout()); this.setBounds(100, 100, 300, 300); this.setVisible(true);}
public static void main(String[] args) {
new JPopupMenuTest();}
}
方法二：
import java.awt.FlowLayout;
import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import javax.swing.*;
public class JPopupMenuTest extends JFrame {
public JPopupMenuTest() { JButton button2 = new JButton("101"); this.add(button2); button2.addMouseListener(new MouseAdapter() { @Override public void mouseReleased(MouseEvent e) { showPopupMenu(e); } }); this.setLayout(new FlowLayout()); this.setBounds(100, 100, 300, 300); this.setVisible(true);}
private void showPopupMenu(MouseEvent e) {
// 如果当前事件与右键菜单有关（单击右键），则弹出菜单 if (e.isPopupTrigger()) { JPopupMenu pop = new JPopupMenu("id1"); final String sid = ((JButton) e.getComponent()).getText(); JMenuItem item1 = new JMenuItem("功能1"); item1.addMouseListener(new MouseAdapter(){ public void mouseReleased(MouseEvent e) { System.out.println(sid); } }); pop.add(item1); //e.getComponent()表示与右键菜单关联的组件，这里指button2 pop.show(e.getComponent(), e.getX(), e.getY()); }else{//如果是正常单击（左键） System.out.println("按到了"); } }public static void main(String[] args) {
new JPopupMenuTest(); }}