LeetCode 165. Compare Version Numbers

public class Solution {    public int compareVersion(String version1, String version2) {        String[] v1 = version1.split("\\.");        String[] v2 = version2.split("\\.");        int l1 = v1.length;        int l2 = v2.length;        int i = 0;while (i != l1 && i != l2) {        if (Integer.valueOf(v1[i]) < Integer.valueOf(v2[i])) return -1;        else if (Integer.valueOf(v1[i]) > Integer.valueOf(v2[i])) return 1;        else i++;        }if (l1 < l2) {for (int j = i; j < l2; j++) {if (Integer.valueOf(v2[j]) != 0) return -1;}return 0;} else if (l1 > l2) {for (int j = i; j < l1; j++) {if (Integer.valueOf(v1[j]) != 0) return 1;}return 0;} else return 0;    }}