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Programatically loading a data jar into the classpath

 
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OK, I know one can load a class during runtime using a ClassLoader but how is this done with a data jar? In particular I am loading a jar that contains JavaHelp which I want to put into the classpath for just long enough to run a JUnit test to check the links. I've been instructed to run the test using an appropriate JavaHelp object, which is why this is necesary.
 
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A ClassLoader has methods getResource and getResourceAsStream; you should be able to use those methods to load whatever non-class resources you need to.
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