check path and classpath for duplicates

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©1996-2012 Roedy Green, Canadian Mind Products

Please do not email me about this project without reading the disclaimer above.

Path Tool

• It displays the path and classpath with one element per line. It lists the jar names in the currently active ext directory, and the name of that directory. This is similar to the Which and What project.
• I tell it someprog.exe then it tells me all the places on the path it found someprog.exe
• I tell it someprog and it tells me all the places on the path it found someprog.exe, someprog.com, someprog.bat, and someprog.btm then tells me which one I would get.
• I tell it com.mindprod.bulk.SomeClass.class It tells me all the places on the classpath (including the active ext jars) that it finds this class, and tells me which one java would actually use. The package name is optional.
• I tell it com.mindprod.bulk.SomeClass.java It tells me all the places on the classpath (including src.zip) that it finds this class, and tells me which one javac would actually use. The package name is optional.
• I ask it to search my entire hard disk and the contents of all jars and report as above.
• You provide a text file containing a list of unqualified jar names you want available. The utility checks the classpath and reports any that don’t appear exactly once on the classpath.

Resources

Most of what you need for a classpath search is implemented in ZipLock. See the storeClass(String className) method and the openResource(,) method it calls. You’d just need to modify main() to call openResource() and modify openResource(,) to print out the place where it found the *.class file.

Eventually you might extend the ability of the program to search the entire Internet using jar catalog files and search engines. The other extension would be to deal in a similar way with *.dll files (or equivalent) on the PATH.

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