+ private static int[] split_version(String version) {
+ String[] tokens = version.split("\\.");
+ int[] ret = new int[tokens.length];
+ for (int i = 0; i < tokens.length; i++)
+ ret[i] = Integer.parseInt(tokens[i]);
+ return ret;
+ }
+
+ public static int compare_version(String version_a, String version_b) {
+ int[] a = split_version(version_a);
+ int[] b = split_version(version_b);
+
+ for (int i = 0; i < Math.min(a.length, b.length); i++) {
+ if (a[i] < b[i])
+ return -1;
+ if (a[i] > b[i])
+ return 1;
+ }
+ if (a.length < b.length)
+ return -1;
+ if (a.length > b.length)
+ return 1;
+ return 0;
+ }
+