Java Reference
In-Depth Information
The Java scripting API also let you compile a script once, store it in the script engine,
and execute the script multiple times. It is supported through the Compilable interface.
A script engine supporting script compilation needs to implement the Compilable
interface. You need to call the compile() method of the Compilable interface to compile
a script. The compile() method returns an instance of the CompiledScript whose
eval() method is called to execute the script.
Note that implementing the Invocable and Compilable interfaces by a script engine
is optional. Before invoking procedures and compiling scripts, you need to check if the
script engine is an instance of these interfaces, cast the engine to these types, and, then,
execute methods of these interfaces.
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