JavaSE-19.3.3【案例-Properties实现猜数字游戏】 

 1 package day10.lesson3;
 2 
 3 import java.io.FileReader;
 4 import java.io.FileWriter;
 5 import java.io.IOException;
 6 import java.util.Properties;
 7 
 8 /*
 9 3.4 案例-Properties实现猜数字游戏
10 
11     实现猜数字小游戏只能试玩3次，如果还想玩，提示：游戏试玩已结束，想玩请充值
12  */
13 public class PropertiesTest {
14     public static void main(String[] args) throws IOException {
15         Properties prop = new Properties();
16         FileReader fr = new FileReader("stage2\\src\\day10\\lesson3\\game.txt");
17 
18         prop.load(fr);
19         fr.close();
20 
21         String countStr = prop.getProperty("count");
22         int count = Integer.parseInt(countStr);
23 
24         if(count >= 3){
25             System.out.println("游戏试玩已结束，想玩请充值");
26         }else {
27             GuessNumber.start();
28             count++;
29             prop.setProperty("count", String.valueOf(count)); //int转str
30             FileWriter fw = new FileWriter("stage2\\src\\day10\\lesson3\\game.txt");
31             prop.store(fw, null);
32             fw.close();
33         }
34 
35         //运行三次后，输出：游戏试玩已结束，想玩请充值
36     }
37 }
 1 package day10.lesson3;
 2 
 3 import java.util.Random;
 4 import java.util.Scanner;
 5 
 6 public class GuessNumber {
 7 
 8     public GuessNumber() {
 9     }
10 
11     public static void start(){
12         Random r = new Random();
13         int number = r.nextInt(100) + 1; //1-100
14 
15         while (true){
16             Scanner sc = new Scanner(System.in);
17             System.out.println("请输入你猜的数字：");
18             int guessNum = sc.nextInt();
19 
20             if(guessNum > number){
21                 System.out.println(guessNum + "猜大了");
22             }else if (guessNum < number){
23                 System.out.println(guessNum + "猜小了");
24             }else {
25                 System.out.println("恭喜，猜中啦");
26                 break;
27             }
28         }
29     }
30 
31 }
#Tue Jun 08 17:39:52 CST 2021
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posted @ 2021-06-08 17:47  yub4by  阅读(57)  评论(0)    收藏  举报