What is the BeanShell Interpreter class?

The Interpreter class, bsh.Interpreter, is BeanShell's core engine - it's the object a host Java application creates and uses to actually execute BeanShell scripts and expressions.

Once instantiated, an Interpreter object exposes methods like eval() (run a script string and get its result), source() (run a script from a file), and set()/get() (exchange variables between the host application and the script's own namespace).

Each Interpreter instance maintains its own namespace of variables and methods, so scripts run through one Interpreter instance are isolated from scripts run through a different instance unless they're explicitly connected or share data through the host application.

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