check path and classpath for duplicates  check path and classpath for duplicates

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This essay does not describe an existing computer program, just one that should exist. This essay is about a suggested student project in Java programming. This essay gives a rough overview of how it might work. I have no source, object, specifications, file layouts or anything else useful to implementing this project.

This project outline is not like the artificial tidy problems you are spoon-fed in school, when all the facts you need are included, nothing extraneous is mentioned, the answer is fully specified, along with hints to nudge you toward a single expected canonical solution. This project is much more like the real world of messy problems where it is up to you to fully the define the end point, or a series of ever more difficult versions of this project, and research the information yourself to solve them.

Everything I have to say to help you with this project is written below. I am not prepared to help you implement it; or give you any additional materials. I have too many other projects of my own.

Though I am a programmer, I don’t do people’s homework for them. That just robs them of an education.

You have my full permission to implement this project in any way you please and to keep all the profits from your endeavor.

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

Path Tool

This suggested student project is a tool that helps you deal with duplicates on the path and classpath. It also helps you find files that should be on the path or classpath but are not.

PathTool : Search Path and Classpath: Dummy Mockup


e.g.

Search:
path
whole disk

Resources

Unix has a whence tool that handles searching the path, but not the classpath. According to Michael Amling, you can implement a crude version with Awk:

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.

Interface Finder: find classes on classpath implementing a given inteface
jar
jar verifier Project
JarCheck
JarLook
Java Jar Catalog Project
jcfind
Which and What Project: path and classpath analysis
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