Question

FindBugs gives me a ‘More arguments are passed than are actually used in the format string‘ message on the following code:

String.format("00", bd.getHour())

bd.getHour() returns an int.

Can someone clarify this? My obective is to make sure that 1 digit ints are preceded by a 0 (1 ->01, 13->13…).

What is the right way to achieve this without getting a FindBugs message?

Answer 1

String.format() follows the rules of format string, so use:

String.format("%02d", bd.getHour());

Because your line, will just print 00 and ignore the added parameter.