"Part 4 and Part 5 of this series covered how you can use Javassist for localized changes to binary classes. This time you'll learn about an even more powerful way of using the framework, taking advantage of Javassist's support for finding all uses of a particular method or field in the bytecode. This feature is at least as important to Javassist's power as its support for a source code-like way of specifying bytecode. Support for selective replacement of operations is also the feature that makes Javassist an excellent tool for adding aspect-oriented programming features to standard Java code."
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