On-the-fly, in-memory java code compilation for Java 5 and Java 6

Question

How can I compile java code from an arbitrary string (in memory) in Java 5 and Java 6, load it and run a specific method on it (predefined)?

Before you flame this, I

Answer 1

If you're not completely tied to compiling, solutions like Beanshell, groovy and the other scripting languages are easily embedded (in-fact, java has built-in support for plugging in a scripting language so your code doesn't even know what language the script is written in)

Beanshell should run any 100% java code IIRC, and I believe Groovy can run most java code--possibly all.