import java.util.ArrayList;
import java.util.Arrays;


public class ArrayFlattener {

	private static ArrayList<Integer> aList = new ArrayList<Integer>();

	public ArrayFlattener(){
		aList = new ArrayList<Integer>();
	}

	public static Integer[] Expend(Object[] arr){

		int length = arr.length;
		Object[] mainArr = arr;

		for(int i =0 ; i < length; i++){

			/*
			 * check if the first element of main array is an array,
			 * if the element is not an array, we add the int to our ArrayList
			 * if the first element is an array, we perform a recursive call on that array
			 */

			Object a = mainArr[i];
			if(a.getClass().isArray()){
				Expend((Object[]) a);
			}
			else{
				aList.add( (Integer) mainArr[i]);
			}

		}

		// convert the ArrayList back to an array
		return aList.toArray(new Integer[aList.size()]);
	}
}