JAVA消息对话框

import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;public class XiXi extends JFrame implements ActionListener{JPanel jp1,jp2;JButton jb1,jb2;XiXi(){super("嘎嘎");jp1 = new JPanel();jb1 = new JButton("确定");jb1.addActionListener(this);jp1.add(jb1);add(jp1);jp2 = new JPanel();jb2 = new JButton("取消");jb2.addActionListener(this);jp2.add(jb2);add(jp2);setBounds(100, 100, 400, 500);setDefaultCloseOperation(EXIT_ON_CLOSE);setVisible(true);setLayout(new FlowLayout());}public static void main(String[] args) {XiXi xiXi = new XiXi();}public void actionPerformed(ActionEvent e){if(e.getSource() == jb1){JOptionPane.showMessageDialog(this, "确定","消息对话框",JOptionPane.INFORMATION_MESSAGE);}else if(e.getSource() == jb2){JOptionPane.showMessageDialog(this, "取消","消息对话框",JOptionPane.INFORMATION_MESSAGE);}}}