swingtest13.java

学习java编程的好程序

import java.awt.*;
import javax.swing.*;
public class Swingtest13 extends Frame 
{
    public static void main(String[] args)
    {
        JOptionPane.showConfirmDialog(null,"这是错误信息！","这是错误信息！",JOptionPane.YES_NO_CANCEL_OPTION);
    }
}