JavaSE-19.3.3【案例-Properties实现猜数字游戏】

package day10.lesson3;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Properties;

/*
3.4 案例-Properties实现猜数字游戏

    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
 */
public class PropertiesTest {
    public static void main(String[] args) throws IOException {
        Properties prop = new Properties();
        FileReader fr = new FileReader("stage2\\src\\day10\\lesson3\\game.txt");

        prop.load(fr);
        fr.close();

        String countStr = prop.getProperty("count");
        int count = Integer.parseInt(countStr);

        if(count >= 3){
            System.out.println("游戏试玩已结束，想玩请充值");
        }else {
            GuessNumber.start();
            count++;
            prop.setProperty("count", String.valueOf(count)); //int转str
            FileWriter fw = new FileWriter("stage2\\src\\day10\\lesson3\\game.txt");
            prop.store(fw, null);
            fw.close();
        }

        //运行三次后，输出：游戏试玩已结束，想玩请充值
    }
}

package day10.lesson3;

import java.util.Random;
import java.util.Scanner;

public class GuessNumber {

    public GuessNumber() {
    }

    public static void start(){
        Random r = new Random();
        int number = r.nextInt(100) + 1; //1-100

        while (true){
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入你猜的数字：");
            int guessNum = sc.nextInt();

            if(guessNum > number){
                System.out.println(guessNum + "猜大了");
            }else if (guessNum < number){
                System.out.println(guessNum + "猜小了");
            }else {
                System.out.println("恭喜，猜中啦");
                break;
            }
        }
    }

}

?

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