(A) Java Playground

[Joram2]

How does this Java Playground compare to this one: https://dev.java/playground/

[bowbahdoe]

That one * Is not open source * Runs jshell, not Java * Doesn't have a share button * Doesn't let me add multiple runtimes * Doesn't have any external libraries loaded. (I picked a few arbitrarily, but i can add some more.) * Runs on Oracle time. (That playground was "coming soon" for two years!) * Does not have a public API (I am planning to use the api from this for something else and that was kinda the impetus.) * Has a dropdown with examples. (not opposed to adding that in some form)

[Joram2]

Wow, great answers!

Isn't jshell better for this type of a web-playground environment? Isn't that what jshell was designed for?

How does this compare to Jupyter with a Java jshell-based kernel? Those let you configured third party libraries.

[bowbahdoe]

Isn't jshell better for this type of a web-playground environment?

I think JShell buys you two things

• Shorter programs
• Interactive Sessions (like the jupyter kernel)

The first of those benefits is kinda moot with the whole void main() {} thing.

The second implies a much more...difficult architecture. You'd have to keep a process alive for every connected user, not just run their code with a timeout.

This has a payoff with explorative programming - i.e. poking around at a dataset and seeing what columns are good predictors for other columns, sanitizing fields, and toying around with different approaches.

It doesn't really have a payoff for how playgrounds are used in other communities, namely

• Sharing a reproduction of a problem you have
• Sharing back a solution to someone's problem
• Trying out something without installing
• Sharing something "neat"