package codingInterview;

public class CompareVersionNumber {

public static void main(String[] args) {

// TODO Auto-generated method stub

String ver1 = "1.3.3.1";

String ver2 = "1.3.3.";

int result = versionCompare(ver1, ver2);

System.out.println(result);

}

private static int versionCompare(String ver1, String ver2) {

// TODO Auto-generated method stub

if (ver1 == null || ver2 == null) {

System.out.println("invalid version numbers");

return -2;

}

String[] ver1Array = ver1.split("\\.");

String[] ver2Array = ver2.split("\\.");

// System.out.println(ver1 + ", " + ver1Array.length);

int i = 0, j = 0;

for (i = 0, j = 0; i < ver1Array.length && j < ver2Array.length; i++, j++) {

// System.out.println(ver1Array[i] + ", " + ver2Array[j]);

if (ver1Array[i].compareTo(ver2Array[j]) < 0) {

return -1;

} else if (ver1Array[i].compareTo(ver2Array[j]) > 0) {

return 1;

}

}

if (i < ver1Array.length) {

if (Integer.valueOf(ver1Array[i]) > 0) {

return 1;

}

}

if (j < ver2Array.length) {

if (Integer.valueOf(ver2Array[j]) > 0) {

return 1;

}

}

return 0;

}

}