Earlier this month, Oracle released a new version of Java, 1.6.0_21 (also called 6u21). Unfortunately as Eclipse users quickly discovered, it was incompatible with Eclipse and Eclipse Rich Client ...
I'm trying to use one of the Apache Commons libraries (Math 3.3) in Java with Eclipse. (JDK 1.7 and Eclipse 3/JDT 3.7) And I can't get away from NoClassDefFoundError ...