Structural Analysis for Java :

Structural Analysis for JavaTM (SA4J) is a technology that analyzes structural dependencies of Java applications in order to measure their stability. It detects structural "anti-patterns" (suspicious design elements) and provides dependency web browsing for detailed exploration of anti-patterns in the dependency web.

SA4J also enables "what if" analysis in order to assess the impact of change on the functionality of the application; and it offers guidelines for package re-factoring.