Integer.toString always prints the argument as signed, even if the radix
is 8 or 16. Whilst this might occasionally be useful, I would argue this
is not the common case, and that for octal or hex output it is more
likely that the client wants unsigned output.

As an example,
  
    System.out.println(Integer.toString(0xcafebabe, 16));

confusing prints out

    -35014542

which is made more confusing by the fact there isn't an alpha-hex digit
in sight!

If nothing else, how about a routine
Integer.toUnsignedString()
or some such?

-- Jon