Median of Two Sorted Arrays

There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).

 

public class Solution {
	public static void main(String[] args) {
		int a[] = {1};
		int b[] = {};
		findMedianSortedArrays(a, b);
	}
    public static double findMedianSortedArrays(int[] nums1, int[] nums2) {
        int len1 = nums1.length;
        int len2 = nums2.length;
        int mid = (len1+len2)/2;
        if ((len1+len2)%2 == 0) {
        	return (findKth(nums1, nums2, mid)+findKth(nums1, nums2, mid+1))/2.0;
        } else {
        	return findKth(nums1, nums2, mid+1);
        }
    }

	public static int findKth(int A[], int B[], int k) {  
		int lenA = A.length;
		int lenB = B.length;
		if (lenA > lenB) {
			return findKth(B, A, k);
		}
		if (lenA == 0) {
			return B[k-1];
		}
		if (k == 1) {
			return Math.min(A[0], B[0]);
		}
		int pa = Math.min(k/2, lenA);
		int pb = k-pa;
		if (A[pa-1] < B[pb-1]) {
			return findKth(Arrays.copyOfRange(A, pa, lenA), B, k-pa);
		} else {
			return findKth(A, Arrays.copyOfRange(B, pb, lenB), k-pb);
		}		
	}  
}