Random随机数

package test;
import java.util.Random;
public class java01 {
    public static void main(String[] args) {
        //1.创建Random对象
        Random rd = new Random();
        int x = rd.nextInt(5);//取值范围[0,5)
        int y = rd.nextInt(5)+2;//取值范围[2,5)
        System.out.println(x);
        System.out.println(y);
    }
}