JDK8 cleanups?

A. Sundararajan sundararajan.athijegannathan at oracle.com
Tue Feb 4 23:25:39 PST 2014


Inline responses below..

On Wednesday 05 February 2014 04:32 AM, Bernd Eckenfels wrote:
> Hello,
> not sure if this is the right list, but I will post it here anyway:
> a) the jdk8 documentation page has a "whats new in jdk8" section and
> this section lists "jjs", however on the doc page itself only
> jrunscript is mentioned:
> http://download.java.net/jdk8/docs/technotes/tools/index.html#enhancements

Looks like a doc oversight. I'll notify.

> b) On the jrunscript documentation page is a sentence which I do not
> understand (or the content behind the link is missing):
> http://download.java.net/jdk8/docs/technotes/tools/windows/jrunscript.html
> #See Also
> #If JavaScript is used, then before it evaluates a user defined script,
> #the jrunscript command initializes certain built-in functions and
> #objects. These JavaScript built-ins are documented in JsDoc-Toolkit at
> #http://code.google.com/p/jsdoc-toolkit/

jrunscript runs "init.js" bundled in the tool itself. This is 
historical. "jjs" does not run that script.

> Is this also true for nashorn, or where can I get this list?
> c) this wiki page is broken:
> https://wiki.openjdk.java.net/display/Nashorn/Nashorn+Documentation

By "broken", do you say any information is missing? or you can't access it?

> d) I guess on this page the word nashorn (or jjs/jrunscript or tools)
> should be mentioned, the current scripting section more looks like the
> integrated java scripting not the tools:
> http://download.java.net/jdk8/docs/technotes/guides/
> e) is there a documentation about a list of all built-in load()
> scripts of nashorn? I have only found a list for fx: in the user guide.

Same wiki page - left panel has link to this page:


> f) both jjs and jrunscript should probably add the scripting guide
> homepage as a see also resource.
Scripting guide is meant for programmatic access for nashorn or any 
other javax.script compliant engines.
Not sure if we should include jjs and jrunscript info there.

> g) jjs -h does not mention that there is a -xhelp

Options displayed by '-h' are the supported option. The options 
displayed by '-xhelp' (including -xhelp) are 'experimental' - may be 
modified/removed in future.
> The actual reason why I was browsing the documentation (and I did not
> find an answer) is, if there is a inspect() like method in jjs to
> discover the environment? I was for example courious if there is some
> JSON support in nashhorn? (or at least an load("nashorn:xxx.js") to
> add?)
JSON is supported because Nashorn implements ECMAScript 5.1 spec - which 
includes JSON object.


As I said earlier, nashorn specific extensions are documented here:


There is no 'inspect'. But, you can do the following in 'jjs':

jjs> Object.getOwnPropertyNames(this)

Hope this helps

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