Krysalis Centipede is a project build system based on Apache Ant. It's made to be easy, extensible and powerful. Easy You can just grab it and start building your project. Anything that is needed for a start is there, and the creation of personalized build targets is straightforward, because it's based on plain Ant. Centipede is un-intrusive, and gives you power without taking any. It also has an interactive target facility, so that the user can just run "build" and choose from a menu. Extensible You just need to add a property to use additional pre-built targets. These packages are called antlibs, and behave like wars and seamlessly add functionality to the build. Let's say you need to make documentation. Just add (an available documentation system based on Cocoon) to the properties file, write the docs, call the forrest in your main build file where you want documentation to be build and all the rest (comprising the download and installation) ...
About Java and it's related concepts..