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DevOps / BeanShell Interview questions

What is the difference between a BeanShell command and a Java method?

A BeanShell command, like print() or source(), is a scripting convenience specific to BeanShell's own environment - it's typically implemented as a .bsh script itself, loaded dynamically by BeanShell's command-loading mechanism, and it isn't a real Java method that exists as compiled bytecode on some class.

A Java method, by contrast, is a real, compiled member of an actual Java class, callable through Java's own method-invocation mechanism, whether that class was compiled ahead of time or, in BeanShell's case, is being interpreted as script.

In practice, a BeanShell script can call ordinary Java methods on real Java objects exactly as Java code would, and separately call BeanShell's own built-in commands - both look like ordinary function calls syntactically, but they're resolved through different underlying mechanisms.

A BeanShell command like print() is typically implemented as:
Both commands and Java methods, from a script author's perspective, look like:

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