ClassMapper is a complete Java reverse engineering tool. It includes tools for visual analysis and decompilation, as well as a relationship browser in one package.ClassMapper automatically decompiles back to Java source, and then generates diagrams showing the basic structural information and relationships among classes and methods. ClassMapper enables you to explore properties of any class, method, or field. These include: classes that reference a given class\; methods that read a given field\; and methods that override a given method. ClassMapper is implemented purely in Java.