java每日一练 2020.7.27

题目

    创建一个长度可由用户输入的数组，存入10-99不重复的数，要求用户输入在另外一个线程实现，并按升序输出；

代码

    Thread1类，负责输入

public class Thread1 implements Runnable {
    @Override
    public void run() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            Test.num = scanner.nextInt();
            if (Test.num >= 0 && Test.num <= 90) {
                break;
            } else {
                System.out.println("您输入的数据有误，请输入0-90之间的数据：");
                Test.num = scanner.nextInt();
            }
        }
    }
}

    Test类：

import java.util.Random;
public class Test {
    static int num = 0;
    public static void main(String[] args) throws InterruptedException {
        System.out.println("请输入数组长度，最大值为90：");
        //创建线程
        Thread1 t = new Thread1();
        Thread t1 = new Thread(t);
        t1.start();
        //等待用户输入正确的元素个数，如果未输入正确的数，则一直休眠主线程，避免主线程继续执行下去导致数组异常
        while(true) {
            if (t1.isAlive())
                Thread.sleep(100);
            else
                break;
        }
        //定义数组
        int[] array = new int[Test.num+1];
        //存入数据
        Random random = new Random();
        int temp = 0;
        array[1] = random.nextInt(90) + 10;
        for (int i = 2; i <= Test.num; i++) {
            for (int j = 1; j < i; j++) {
                //判断随机数是否重复、是否为两位数
                if (temp == array[j] || temp < 10 || temp > 99) {
                    j = 1;
                    temp = random.nextInt(90) + 10;
                }
            }
            array[i] = temp;
        }
        System.out.println("排序前的数组元素：");
        for (int i = 1; i <= Test.num; i++) {
            if (i % 10 == 0 || i == Test.num)
            System.out.println(array[i]);
            else
                System.out.print(array[i] + " ");
        }
        //直接插入法排序
        for (int i = 2 ; i <= Test.num; i++) {
            if (array[i] < array[i-1]){
                array[0] = array[i];
                for (int j = i-1 ; array[0] < array[j]; j--) {
                    array[j+1] = array[j];
                    array[j] = array[0];
                }
            }
        }
        System.out.println("排序后的数组元素：");
        for (int i = 1; i <= Test.num; i++) {
            if (i % 10 == 0)
                System.out.println(array[i]);
            else
                System.out.print(array[i] + " ");
        }
    }
}

结果

    实现这个功能并不需要多线程，只是因为刚刚学习多线程，所以加进去练练手，可忽略。