How to generate all numbers randomly between two given integers without duplication in Java?

I found answers on how to generate random numbers but nowhere how to generate all the numbers in the range without duplication in Java. Please share if you have a solution. Below is what I did but it simply generates randomly the numbers. I need to print out all numbers in the range without duplication!

package com.company;

import java.util.*;


public class RandomizeNumbers {

    public static void main(String[] args) {

        //Create Scanner
        Scanner userInput = new Scanner(System.in);

        //Ask for numbers N and M
        System.out.println("Please enter two numbers and the program will randomize the numbers between them. " +
                "The first number N must be bigger or equal to the second number M");
        System.out.println("Please enter the first number N");
        int n = userInput.nextInt();
        System.out.println("Please enter the second number M");
        int m = userInput.nextInt();
        Random randomGenerator = new Random();
        int difference = n - m;
        //Randomize the numbers
        if (m<=n){
            for(int i = 0; i<= difference; i++ ) {
                int randomInt = randomGenerator.nextInt(n - m + 1) + m;
                System.out.println(randomInt);
            }
        }
            else{
            System.out.println("Please enter M less or equal to N");
        }

    }
}