Shuffle the elements of the array randomly

I have written the code to shuffle the elements of the array. Please let me know of any loopholes in the written code.

package dataStructureInJava;

import java.awt.SystemTray;
import java.util.Random;
import java.util.Scanner;

public class ShuffleArr {
    public static void main(String[] args){
        System.out.println("Main Method Started");
        int [] arr = initArr();
        printArr(arr);
        arr = swapArr(arr);
        printArr(arr);
        System.out.println("Main MEthod Ended");
    }
    public static int[] initArr(){
        Scanner in = new Scanner(System.in);
        Random rand = new Random();
        System.out.println("Enter the limit of the arr");
        int limit = in.nextInt();
        System.out.println("Enter the maximum value of the arr");
        int maxValue = in.nextInt();
        int[] arr = new int[limit];
        for(int ii=0;ii<limit;ii++){
            arr[ii] =  rand.nextInt(maxValue);
        }
        return arr;
    }
    public static int[] swapArr(int[] arr){
        Random rand = new Random();
        for(int ii=0;ii<arr.length;ii++){
            arr = swap(arr,ii,rand.nextInt(arr.length));
        }
        return arr;
    }
    public static int[] swap(int[] arr,int ii,int jj){
        int temp=arr[ii];
        arr[ii]=arr[jj];
        arr[jj]=temp;
        return arr;
    }
    public static void printArr(int[] arr){
        System.out.println("Element of the arr are");
        System.out.print("{");
        for(int ii=0;ii<arr.length;ii++){
            System.out.print(arr[ii] + " ");
        }
        System.out.print("}");
        System.out.println();
    }
}

I got his question as an assignment and want to know if it is correct or not.

Naming

• I would write array out instead of shortening it to arr (it's just two more letters), because it's more readable (but I do like that you are very consistent with your shortening).

• is there a reason that you are using ii/jj instead of the more commonly used i/j?

Spacing

You should use a lot more spaces, because they make your code easier to read.

I would at least add spaces after , and ;, before {, and around all = and `

StackExchange Code Review Q#79922, answer score: 10