先导包

import java.util.*;import javax.swing.*;

再写主方法

public static void main(String[] args) {}

新声明一个Scanner和随机数

public static void main(String[] args) { Scanner in = new Scanner(System.in); Random r = new Random();}

让UIManager爬取系统窗口样式

try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());} catch (Exception e) { e.printStackTrace();}

新建一个int类型的变量存储随机数

int secret = r.nextInt(32) + 1;

写入主程序

JOptionPane.showMessageDialog(null, "电脑随机生成了一个1~32之间的数，请猜出这个数", "猜数字游戏", JOptionPane.PLAIN_MESSAGE);String number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, "");int number = Integer.parseInt(number2);while (number != secret) { if (number > secret) { JOptionPane.showMessageDialog(null, "你猜的数大了，请继续猜", "猜数字游戏", JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, ""); number = Integer.parseInt(number2); } else { JOptionPane.showMessageDialog(null, "你猜的数小了，请继续猜", "猜数字游戏", JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, ""); number = Integer.parseInt(number2); }}JOptionPane.showMessageDialog(null, "恭喜你，你猜对了，电脑生成的随机数是" + secret, "猜数字游戏", JOptionPane.PLAIN_MESSAGE);

全部代码

package com.demo05;import java.util.*;import javax.swing.*;public class MathDemo03 { public static void main(String[] args) { Scanner in = new Scanner(System.in); Random r = new Random(); int secret = r.nextInt(32) + 1; try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception e) { e.printStackTrace(); } JOptionPane.showMessageDialog(null, "电脑随机生成了一个1~32之间的数，请猜出这个数", "猜数字游戏", JOptionPane.PLAIN_MESSAGE); String number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, ""); int number = Integer.parseInt(number2); while (number != secret) { if (number > secret) { JOptionPane.showMessageDialog(null, "你猜的数大了，请继续猜", "猜数字游戏", JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, ""); number = Integer.parseInt(number2); } else { JOptionPane.showMessageDialog(null, "你猜的数小了，请继续猜", "猜数字游戏", JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null, "请输入想猜的数：", "猜数字游戏", JOptionPane.PLAIN_MESSAGE, null, null, ""); number = Integer.parseInt(number2); } } JOptionPane.showMessageDialog(null, "恭喜你，你猜对了，电脑生成的随机数是" + secret, "猜数字游戏", JOptionPane.PLAIN_MESSAGE); }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。