先导包
import java.util.*; import javax.swing.*;
再写主方法
public static void main(String[] args) { }
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(); }
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:",JOptionPane.PLAIN_MESSAGE,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",JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null,""); number = Integer.parseInt(number2); } else { JOptionPane.showMessageDialog(null,"你猜的数小了,请继续猜",""); number = Integer.parseInt(number2); } } JOptionPane.showMessageDialog(null,"恭喜你,你猜对了,电脑生成的随机数是" + secret,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,JOptionPane.PLAIN_MESSAGE); String number2 = (String) JOptionPane.showInputDialog(null,""); int number = Integer.parseInt(number2); while (number != secret) { if (number > secret) { JOptionPane.showMessageDialog(null,JOptionPane.PLAIN_MESSAGE); number2 = (String) JOptionPane.showInputDialog(null,""); number = Integer.parseInt(number2); } else { JOptionPane.showMessageDialog(null,""); number = Integer.parseInt(number2); } } JOptionPane.showMessageDialog(null,JOptionPane.PLAIN_MESSAGE); } }
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