Question

JAVA编程题目 求大神解答

键盘输入一个数字之后开始执行循环输出随机数到控制台
要求：有输入提示语、随机数、控制台输出
提示：hasNext()方法是判断是否有键盘输入值

Answer 1

import java.util.Arrays;

import java.util.Random;

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

try {

System.out.println("请输入5个数，用空格分割");

Scanner scanner = new Scanner(System.in);

String str = scanner.nextLine();

String[] numArr = str.split(" ");

boolean status = true;

System.out.println("5s后，每隔1s进行一次抽奖，请稍后");

Thread.sleep(5000);

while (status) {

String[] arr = new String[5];

for (int i = 0; i < 5; i++) {

arr[i] = getNum();

}

if (Arrays.equals(numArr, arr)) {

status = false;

}else {

System.out.println("抱歉未中奖，1s后再次开奖。本次中奖号码："+Arrays.toString(arr));

Thread.sleep(1000);

}

}

if(!status) {

System.out.println("这一行基本你看不到，如果看到恭喜你可以期买彩票了！！！");

}

} catch (Exception e) {

e.printStackTrace();

}

}

public static String getNum() {

int max = 23;

Random random = new Random();

int num = random.nextInt(max);

if (num >= 10) {

return num + "";

} else {

return "0" + num;

}

}

}