Question

java怎么在几个数字中随机取出一个

Answer 1

import java.util.Random;

public class RandomNumber {

	public static void main(String[] args) {

		int []numbers = {1,2,5,4,3,42,71,25,6};
		Random random = new Random();
		int index = random.nextInt(numbers.length);
		System.out.println(numbers[index]);
		
	}

}

Answer 2

int[] i = {1,5,6,9,7,8,2,3};
Random random = new Random();
int r = random.nextInt(i.length);
int a = i[r];