Busy Java Developer's Guide to Multi-Paradigm Design
The Java Virtual Machine is home to several different languages beyond Java, many of which mix ideas (paradigms) together to create a flexible language. Languages which support these different paradigms can be awkward and hard to understand how to use at first.
But if we tear apart the paradigms, examine each one and its advantages and disadvantages, then we can go back to bringing them all back together to create some truly elegant and powerful software designs. It all begins with understanding what software design paradigms are.