Java API —— Random类

import java.util.Random;
public class RandomDemo01 {
    public static void main(String[] args) {
        Random r1 = new Random();
        for (int x = 0; x < 10; x++) {
            int num1 = r1.nextInt(100) + 1;
            System.out.print(num1 + ",");
        }
        System.out.println();
        System.out.println("---------------------------");
        //给定种子后，每次的得到的随机数都是一样的。
        Random r2 = new Random(1111);
        for (int x = 0; x < 10; x++) {
            int num2 = r2.nextInt(100) + 1;
            System.out.print(num2 + ",");
        }
    }
}