A Java package for pretty-printing a text by deciding where to introduce line-breaks and indentation. A Java implementation of Derek Oppen\'s pretty printing algorithm. It is not a pretty printer for Java code, though it could be used to write one.
KeY (key-project.org) uses jpplib & mark() for interaction
Some data printed on one line or broken with indentation.
Some layouted XML, syntax-highlighted using mark()