Which4J Find occurrences of a class in your classpath or any ClassLoader
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Which4J Tags

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Which4J Description

Which4J is a simple utility app that helps you determine where classes are being loaded from. This can be especially helpful in debugging classpath and classloader problems. It serves the same general purpose as the Unix which command except it searches your classpath (or a particular classloader) instead of your shell command path. Which4J can be run in command-line mode to search your system classpath for all occurrences of the specified classname. More importantly, it can also be used programmatically to search a particular ClassLoader for the first occurrence of the specified classname or Class instance. This can be extremely valuable when trying to debug problems in web containers and application servers that have sophisticated ClassLoader hierarchies. Get Which4J and take it for a test drive to see what it's really capable of!

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