此次代码可实现随机生成20个整数，将这20个数从小到大进行排列

package biji;

import java.util.Arrays;
import java.util.Random;

public class demo11 {
    public static void main(String[] args) {
        Random random = new Random();
        int[] a=new int[20];
        for (int i = 0; i < a.length; i++) {
            a[i]= random.nextInt(100);
        }
        System.out.println(Arrays.toString(a));
       Arrays.sort(a);
        System.out.println(Arrays.toString(a));
    }
}

代码运行如下：