Implementation example of guessing number game with GUI interface in Java

Pilot package

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

Rewrite main method

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

Newly declare a scanner and a random number

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

Let uimanager crawl the system window style

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

Create a new variable of type int to store random numbers

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

Write into the main program

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);

All codes

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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