Main JImports docs doesn't mention how to enable the import behaviour

[pelson]

The docs in https://jpype.readthedocs.io/en/latest/imports.html never actually tell you how to start the JImport mechanism. As a result, that page only has limited usefulness. Ironically, the place when it is mentioned https://jpype.readthedocs.io/en/latest/api.html?highlight=import#jpype-imports-module links to the page with less detail.

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(as an asside)

I've made a case in the past that the imports system is nice, but unfortunately a bit crippled by the need to have runtime requirements (like a running JVM). What I would love is if we had something more declarative and lazy, such that:

from java_packages.java.lang import String  # (java_packages name to be discussed)

Will work just fine without the JVM running, but String("foo") would raise a JVMNotRunning exception if the code is run without having previously started the JVM.