Reverse array - iterative and recursive

reverse.java

import java.io.*;
import java.util.*;

class reverse 
{
    public void iterative(int a[], int start, int end) 
    {
        int temp;
        
        while(start < end) {
            temp   = a[end];
            a[end] = a[start];
            a[start] = temp;
            start++;
            end--;
            
        };
        
        System.out.println("reversed iterative");    
        for(int k:a) {
            System.out.println(k);
        }
    }
    
    public static void recursive(int a[], int start, int end)
    {
        if (start >= end)
            return;
        int temp = a[end];
        a[end]   = a[start];
        a[start] = temp;
        recursive(a, ++start, --end);
    }
    
    public static void main(String[] args) 
    {
        reverse obj = new reverse();
        int arr[] = {1, 2, 3, 4, 5, 6, 7};
        int n = arr.length;
        obj.iterative(arr, 0, n-1);
        recursive(arr, 0, n-1);
        // same array reversed twice
        System.out.println("reversed recursive");    
        for(int k:arr) {
            System.out.println(k);
        }
    }
}