java - Double.parseDouble() gives "Multiple Points, NumberFormatException" -

i have compare 2 strings parsing them double.
strings are: "2.1.10" , "2.1.9". here, need know whether first 1 greater second 1 or not?
but, while parsing these using
double.parsedouble("2.1.10") or double.parsedouble("2.1.9") giving nullpointerexception saying "multiple points".

you don't compare doubles, compare version numbers, , not numbers, must compare each position.

something like:

string[] v1 = "2.1.9".split("\\."); string[] v2 = "2.1.10".split("\\.");  if (v1.length != v2.length)     return;  (int pos = 0; pos < v1.length; pos++) {     // compare v1[pos] v2[pos] necessary     if (integer.parseint(v1[pos]) > integer.parseint(v2[pos])) {         system.err.println("v1 greater");     } else if (integer.parseint(v1[pos]) < integer.parseint(v2[pos])) {         system.err.println("v2 greater");     } } 

result:

v2 greater