The original Java style guide from 1997 defined "FIXME" and "XXX" in section 10....

The original Java style guide from 1997 defined "FIXME" and "XXX" in section 10.5.4 https://www.oracle.com/technetwork/java/codeconventions-1500...

> Use XXX in a comment to flag something that is bogus but works. Use FIXME to flag something that is bogus and broken.