Java实现两种猜数游戏

1.编程实现猜数游戏案例

1.1. Java代码

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

/**
 * <p>Project: zixinyuan - OracleUtil
 *
 * @author zixinyuanya [2991228540@qq.com]
 * @version 1.0
 * @since 17
 */
public class Ex1 {
    public static void main(String[] args){
        Random rand = new Random();
        int start = 100;
        int end = 1000;
        //返回100-1000范围内的随机整数数字
        int num = rand.nextInt(end-start+1) + start;
        Scanner scanner = new Scanner(System.in);
        int i = 0;
        while (true){
            ++i;
            System.out.printf("请输入数字[%d - %d]：", start, end);
            //Scanner 类的实例对象 .nextInt() 是无参方法没有参数，返回一个int，内容是你键盘输入的数字
            int t = scanner.nextInt();
            if(t < start || t > end ){
                System.out.printf("输入有误, 必须在%d - %d 范围内%n", start,end);
                continue;
            }
            if (t > num){
                System.err.printf("%d、太大了%n", i);
            }else if (t < num) {
                System.err.printf("%d、 太小了%n", i);
            }else{
                System.out.printf("恭喜, 你猜对了, 你的游戏分数: %d分。", (100 - --i * 10));

                break;
            }

            if (i >=10){
                System.out.println("游戏结束");
            }
        }

    }



}

1.2.执行结果

2.编程实现猜数游戏，使用try catch处理异常。

2.1.Java代码

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

/**
 * <p>Project: zixinyuan - OracleUtil
 *
 * @author zixinyuanya [2991228540@qq.com]
 * @version 1.0
 * @since 17
 */
public class Ex2 {
    public static void main(String[] args) {
        Random rand = new Random();
        Scanner sc = new Scanner(System.in);
        int t = rand.nextInt(1, 101);
        while (true) {
            System.out.print("请输入[1-100] : ");
            int n = 0;
            try {
                n = sc.nextInt();
                if(n<1 || n>100){
                    //throw new GuessNumException("必须输入1-100整数");
                    System.out.println("必须输入1-100整数");
                    continue;
                }
                //} catch (GuessNumException e) {
                //    System.out.println(e.getMessage());
            } catch (Exception e) {
                if("quit".equalsIgnoreCase(sc.next())){
                    System.out.println("游戏结束");
                    break;
                }else{
                    System.out.println("必须输入整数");
                    continue;
                }
            }

            if (n > t) {
                System.out.println("太大了");
            } else if (n < t) {
                System.out.println("太小了");
            } else {
                System.out.println("恭喜，你猜对了.");
                break;
            }
        }
    }

    public static void one(String[] args) {
        Random rand = new Random();
        Scanner sc = new Scanner(System.in);
        int t = rand.nextInt(1, 101);
        while (true) {
            System.out.print("请输入[1-100] : ");
            int n = 0;
            if (sc.hasNextInt()) {
                n = sc.nextInt();
            } else {
                System.out.println("请输入整数");
                sc.next();
                continue;
            }
            if (n > t) {
                System.out.println("太大了");
            } else if (n < t) {
                System.out.println("太小了");
            } else {
                System.out.println("恭喜，你猜对了.");
                break;
            }
        }

    }





}

2.2. 执行结果