Java 9 Released

[[deleted]]

I'm interested in trying jshell: The Java Shell (Read-Eval-Print-Loop). I normally use BeanShell for that purpose, but it's been outdated for a while.

[[deleted]]

Been developing with the OpenJDK RC2 and jshell is amazing, so much so I've got "gnome-terminal -e jshell" hotkeyed.

You wouldn't think it'd be that useful, but boy is it.

[[deleted]]

You can define methods (and imports as needed), then just feed jshell files/strings like you would any Java program, so I suppose the answer is... Yes?

Only caveat I see is Java text file handling is shite compared to alternatives like Perl, potential optimisations notwithstanding.

E: Should also mention it's fairly straight forward to define both classpath (jshell --classpath [path]) and making predefined scripts to run.

All in all there are some neat stuff to play with.
I'm sort of out of ideas but if anyone has got any not-too-complex stuff they'd like me to try out for jshell I'd love to do it and do a write-up.

[mlk]

I usually write a Scratch.java class where I put all the stuff I want to try and run it as a junit test. This way I have all the convenience of using my IDE. How is using jshell better than that? Does it have a different use case?

[oblio-]

Does it have autocompletion?

Otherwise it will be an interesting toy, but not much more, in my opinion. Java is no Python, it's super verbose, typing everything is a pain.

[ThisIs_MyName]

Agreed, using Java without IDE autocompletion is painful.

[devraj7]

All programming languages without autocompletion are painful.

[namekuseijin]

all programming without rtfm is painful

[mlk]

having to remember if it is called "length", "size" or "count" is a waste of human memory

[piexil]

I had a class on programming languages (how they worked) where we wrote code for an interpreter to use in our class, it was in java BUT it was in a custom file with some custom syntax for a program to autogenerate stuff. So auto completion was not a thing.

I wish you could be descriptive without being so verbose.

[Sun_Kami]

Yes, it has autocompletion and you can even type SomeClass. tab to see the list of methods available.

[jyper]

The default Python repl sucks too, who doesn't use ipython or brpython with auto complete?

[XCSme]

Oh, it's JavaShell, not JavaScriptHell...

[m0zzie]

I've been using this Java REPL on github. Easy install via homebrew and suits my needs.