MergeSortedArray.java

package array;

/**
 * Created by gouthamvidyapradhan on 29/07/2017.
 * Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.
 * <p>
 * Note:
 * You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2. The number of elements initialized in nums1 and nums2 are m and n respectively.
 */
public class MergeSortedArray {
    public static void main(String[] args) throws Exception {
        int[] A = {0};
        int[] B = {1};
        new MergeSortedArray().merge(A, 0, B, 1);
        for (int i : A)
            System.out.println(i);
    }

    public void merge(int[] nums1, int m, int[] nums2, int n) {
        int i = m + n - 1, j = m - 1, k = n - 1;
        while (j >= 0 && k >= 0)
            nums1[i--] = (nums1[j] > nums2[k]) ? nums1[j--] : nums2[k--];
        while (k >= 0)
            nums1[i--] = nums2[k--];
    }

}