Problems like this are common in opensource projects because they want to work in as many JDK version as possible, but want to use decent APIs. I've also been on two projects now where we've had to implement a wrapper to simulate the JDK1.4 Regex APIs in JDK1.3 using the Jakarta regex package. This is slowly becoming a non-issue as people migrate past JDK1.3, but has anyone seen an opensource project that does this already?
Speaking of backporting, here's a couple links to backporting features from 1.5:
-http://retroweaver.sourceforge.net/index.html
-http://www.amberarcher.org/projects/panno/
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