A good example is found in a newly created Android Project in Eclipse with the ADT plugin. The project space is seen below:
Here we can see a pretty impressive hierarchy. There's a directory called gen for Generated Java Files, it contains a single directory called android.support.v7.appcompat, which contains a single Java class file called BuildConfig.java, which contains a single class called BuildConfig, which contains a single variable (a boolean), which is set to true. Yes, that's a 5 layer hierarchy to store a single boolean constant.