Draft JEP: Launch Single-File Source-Code Programs (original) (raw)

Jonathan Gibbons jonathan.gibbons at oracle.com
Mon Feb 12 23:07:30 UTC 2018

On 2/12/18 1:37 PM, David Lloyd wrote:

On Thu, Feb 8, 2018 at 5:18 PM, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:

This draft JEP contains a proposal to enhance the java launcher to support running a program supplied as a single file of Java source code. The program will be compiled and run, without the need to explicit invoke javac, or to package up a jar file.

For more details, see: http://openjdk.java.net/jeps/8192920 It was pointed out on IRC that it would seem almost more fitting to fit this in to javax.script as a ScriptEngine, using the existing jrunscript as a launcher instead of java. Weird but also not weird at all! It would be worth explaining why this shouldn't be the case in the JEP (if indeed it shouldn't be the case).

Good question.

I note that jrunscript is listed as "Note: This tool isexperimental and unsupported.". Also, it does not appear to be shebang-friendly, since it would require a number of options to configure, and shebang lines should generally contain at most a single option after the path for the executable.

-- Jon

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