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    <p>A complete (coded) solution would be a bit beyond a single Stack Overflow answer, so I'll outline the points you need to be aware of instead if you decide to write your own ClassLoader:</p> <ol> <li>The classloader represents (part of) a namespace, and two otherwise identical classes loaded by different classloaders are not "equal". Which means there are a few dangers lurking in classloading, notably singletons suddenly not being so single anymore as well as casts failing unexpectedly.</li> <li>Classloaders (should) work on a pattern of delegating to the "parent" loader before attempting anything themselves (see above).</li> <li>Class loading and linking are two distinct steps (even though example implementations of a classloader such as may be found in blog posts/online Java articles, will combine the two into one for simplicity) Therefore you should not assume that if a parent loader has loaded a class it has also loaded all dependencies ...</li> <li>All this means there is a problem if class A loaded by loader A references a class B which neither loader A nor any of its parents can load: class A may load just fine in loader A but at the point of use it fails because loader A cannot fully resolve (link) it.</li> <li>And you should make sure that your classloader loads classes in a synchronized manner otherwise the issues hinted at in step #1 can leap from duplicates due to classloaders to duplicates from multiple threads using the same classloader as well...</li> </ol> <p>Note: it is <strong>far</strong> easier to just use the <code>-cp</code> switch in some wrapper script/batch file for your program.</p>
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