merge-sorted-array Java code

Given two sorted integer arrays A and B, merge B into A as one sorted array.
Note:
You may assume that A has enough space to hold additional elements from B. The number of elements initialized in A and B are m and n respectively.

import java.util.Deque;import java.util.LinkedList;public class Solution {    public void merge(int A[], int m, int B[], int n) {        Deque<Integer> arr = new LinkedList<Integer>();        int i = 0, j = 0;        for(int k = 0; k < m + n; k++){            if(i > m - 1)         arr.push(B[j++]);            else if(j > n - 1)    arr.push(A[i++]);            else if(A[i] <= B[j]) arr.push(A[i++]);            else                  arr.push(B[j++]);        }        int index = m+n-1;        while(!arr.isEmpty())            A[index--] = arr.pop();    }}