Can someone teach me how to get this output

try this code

        Scanner sc=new Scanner(System.in);
        System.out.print("Enter Array Size:");
        int f,midd=0;
        int arrSize = sc.nextInt();
        System.out.println("The Size of your Array is "+ arrSize);
        int arr[] = new int[arrSize];
        System.out.println("Enter "+arrSize+" Elements of your Array: ");
        for(int i=0;i<arr.length;i++){
            arr[i] = sc.nextInt();
        }
        if(arrSize%2==0){
            f=0;
        }
        else {
            f=1;
            midd=(int)(arrSize/2/2)+1;
        }
        for(int i=arrSize-1; i>=0;){
            if(f==0)
            {
                System.out.print(Arrays.asList(arr[i]+","+arr[i-1]));
                i-=2;
            }
            else{
                if(midd==i){
                    System.out.print(Arrays.asList(arr[i]));
                    i--;
                }
                else {
                    System.out.print(Arrays.asList(arr[i]+","+arr[i-1]));
                    i-=2;
                }
            }
        }

provide this program inside main method Output:

Enter Array Size:5
The Size of your Array is 5
Enter 5 Elements of your Array: 
1
2
3
4
5
[5,4][3][2,1]

.

Enter Array Size:4
The Size of your Array is 4
Enter 4 Elements of your Array: 
1
2
3
4
[4,3][2,1]

.

Enter Array Size:7
The Size of your Array is 7
Enter 7 Elements of your Array: 
1
2
3
4
5
6
7
[7,6][5,4][3][2,1]