编写一个程序，读取两个非负整数“ x”和“ y”（其中x <y），然后打印x ... y范围内的三个随机整数

import java.util.Scanner;
import java.util.Random;

public class Lab04b 
{       
    public static void main(String []args)
    {    
        Random generator = new Random (); 
        Scanner scan = new Scanner(System.in);

        int num1;
        int num2;
        int num3;

        System.out.println("Enter X:");
        num1 = scan.nextInt();

        System.out.println("Enter Y:");
        num2 = scan.nextInt();

        num3 = generator.nextInt(num2) + num1;
        System.out.println("3 random integers in the range " + num1 + ".." + num2 + " are: " + num3);
    }
}

我被困在如何获取x和y范围之间的3个随机整数。Y是最大整数。