Question

我正在制作一个程序，对一组整数使用选择排序，但我通过允许用户询问他们想要排序多少整数，以及他们是否想要输入整数或想要随机生成的整数。我已经将程序编码为能够生成随机整数，但我还没有让用户能够生成自己的数字。

我如何能够获取这些随机生成的数字，并将它们放入数组中，以便我可以对这些值使用选择排序？

package sortingexcersices;

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

public class SortingExcersices {

    public static int myarray[], numOfElements, arrValues, n;

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);

        System.out.println("How many integers do you want to sort?");
        numOfElements = in.nextInt();

        myarray = new int[numOfElements];

        boolean found = false;

        do {

            System.out.println("If you would like random numbers, press 1.");
            System.out.println("If you would like to generate your own numbers, press 2.");

            n = in.nextInt();

            if (n == 1) {
                found = true;
            } else if (n == 2) {
                found = false;
            } else {
                System.out.println("Your input was invalid.");
            }

        } while (n != 1 && n != 2);

        if (found = true) {
            Random values = new Random();

            for (int i = 1; i <= myarray.length; i++) {
                arrValues = 1 + values.nextInt(50);
                System.out.print(arrValues + " ,");


            }
        }

    }
}

Answer 1

在Java中，数组是零索引的...你的for循环应该从int i = 0开始。然后你可以只分配值：

Random values = new Random();
for (int i = 0; i < myarray.length; i++) {
    myarray[i] = values.nextInt(50);
}

然后通过调用Arrays.sort(myarray)或在必要时实现自定义排序功能来实现排序。

Answer 2

for(int i = 0; i < myarray.length; i++){
 myarray[i] = 1 + values.nextInt(50);
 System.out.print(myarray[i] + " ,");
}

Answer 3

for (int i = 1; i <= myarray.length; i++) {
    arrValues[i] = 1 + values.nextInt(50); //you have to add the position
    System.out.print(arrValues + " ,");
}

如何将我的随机值放入java中的数组中？

3 个答案: