An extremely common use case for the "toString" methods on Archive are to print the contents of the Archive to stdout.

System.out.println(archive.toString(true));

Having to wrap the call in System.out.println is really annoying (even with editor shortcuts). ShrinkWrap should provide parallel print methods, that print to stdout (or perhaps to an optional stream argument).

archive.print()
archive.print(true)
archive.print(Formatter)

• parallel methods that accept a stream if warranted
• I'd also settle for printArchive()

This feature is consistent with the ever popular Exception#printStackTrace().

UPDATE: See comment about writeTo() proposal.