I’ve the same problem with Apache Commons. I’ve downloaded the latest version, and still fails.

I’ve make some “changes” to your code. I’ve changed the “isInRange(String)” method, and not to add new method -like you-

// Doesn’t go OK
// public boolean isInRange(String address) { return isInRange(toInteger(address)); }
private boolean isInRange(int address) { return ((address-low())