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| public class CompareVersionNumbers {
private static final Logger log = Logger.getLogger(CompareVersionNumbers.class);
public int compareVersion(String version1, String version2) {
assert version1 != null;
assert version2 != null;
version1 = version1.trim();
version2 = version2.trim();
String[] v1 = version1.split("\\.");
String[] v2 = version2.split("\\.");
int result = 0;
int l1 = v1.length;
int l2 = v2.length;
for (int i = 0; i < Math.max(l1, l2); i++) {
int a = ((l1 <= i) || v1[i].isEmpty()) ? 0 : Integer.valueOf(v1[i]);
int b = ((l2 <= i) || v2[i].isEmpty()) ? 0 : Integer.valueOf(v2[i]);
if (a > b) {
result = 1;
break;
} else if (a < b) {
result = -1;
break;
}
}
return result;
}
}
|