在 Java 中显示小于 20 的随机数
首先,创建一个 Random 类对象 -
Random rand = new Random();
现在,创建一个新数组 -
int num; int arr[] = new int[10];
循环并用 20 作为参数设置 Random 的 nextInt,因为你希望随机数小于 20 -
for (int j = 0; j <= 9; j++) { num = 1 + rand.nextInt(20); arr[j] = num; }
示例
import java.util.Arrays; import java.util.Random; public class Demo { public static void main(String[] args) { Random rand = new Random(); int num; int arr[] = new int[10]; for (int j = 0; j<= 9; j++) { num = 1 + rand.nextInt(20); arr[j] = num; } System.out.println("Random numbers less than 20 = "+Arrays.toString(arr)); } }
输出
Random numbers less than 6 = [4, 13, 14, 19, 1, 11, 17, 1, 11, 4]
广告