利用Random类来产生5个20～30之间的随机整数

Question

 

Answer 1

import java.util.Random;
public class Test03 {
		public static void main(String[] args) {
			   Random rand = new Random();
		        int[] num = new int[5];
		        for (int i = 0; i < num.length; i++) {
		            num[i] = 20 + rand.nextInt(11);
		            System.out.println(num[i]);
		        }
		}
}