Java 对话框

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class li {

    public static void main(String[] args) {
        
        
        JFrame frame = new JFrame("窗体");
        //显示一个对话框
        frame.setBounds(300, 300, 300, 400);
        //消息对话框
        JOptionPane.showMessageDialog(frame, "明天不用上课", "通知",JOptionPane.INFORMATION_MESSAGE);
        //警告对话框
        JOptionPane.showMessageDialog(frame,"警告某位同学","警告",JOptionPane.WARNING_MESSAGE);
        //错误对话框
        JOptionPane.showMessageDialog(frame,"扣6分","错误",JOptionPane.ERROR_MESSAGE);
        
        //输入框
        String moeny = JOptionPane.showInputDialog("请输入你要给我的金额($)");
        System.out.println("money:"+ moeny);
        
        //确认框
        int num = JOptionPane.showConfirmDialog(frame, "你确认要卸载吗？");
        System.out.println(num);
    }
    
}