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For the most of us developers, generating Java source files is an occasionally happening task and we’re dealing with it e.g. when writing annotation processors, writing tools or interacting with meta-data files. JavaPoet is a nice library to simplify such tasks, offering an intuitive fluent-builder API to generate source files in no time. In the following tutorial I’d like to share a few examples by writing code generators with the help of this library. ...

Parboiled is a modern. lightweight and easy to use library to parse expression grammars in Java or Scala and in my humble opinion it is perfect for use cases where you need something between regular expressions and a complex parser generator like ANTLR. In the following tutorial we’re going to create a simple grammar to specify a task list and write an implementation of a parser also as unit tests for each grammar rule in Java. ...