[netCDFJava #ALR-856518]: java/html to display some statistics

Greetings Owen!

If you check out the current packages contained in the netcdf-java library 
(http://www.unidata.ucar.edu/software/netcdf-java/v4.2/javadoc/index.html), you 
will see that none of the packages your example tries to import exist. As the 
comments at the beginning of the file indicate, CreateNetcdf.java is using the 
v1 interface - you are using the v4 library.

So, to test your package, try the following example:

http://www.unidata.ucar.edu/software/netcdf/examples/programs/Simple_xy_wr.java

If you keep the .java file and the .jar file in the same directory, you may 
compile it using:

javac -classpath netcdfAll-4.2.jar Simple_xy_wr.java

Then, to run the file, execute:

java -cp netcdfAll-4.2.jar:. Simple_xy_wr

Notice that I've added '.' (i.e. the current directory) to the classpath.

For an example of using netcdf-Java to read a netcdf file, check out:

http://www.unidata.ucar.edu/software/netcdf/examples/programs/Simple_xy_rd.java

This example will read the file that Simple_xy_wr creates.

Cheers!

Sean

PS: sorry for the duplicate email - please reply to this one and ignore the 
previous one :-)

> Greetings Owen!
> 
> If you check out the current packages contained in the netcdf-java library 
> (http://www.unidata.ucar.edu/software/netcdf-java/v4.2/javadoc/index.html), 
> you will see that none of the packages your example tries to import exist. As 
> the comments at the beginning of the file indicate, CreateNetcdf.java is 
> using the v1 interface - you are using the v4 library.
> 
> So, to test your package, try the following example:
> 
> http://www.unidata.ucar.edu/software/netcdf/examples/programs/Simple_xy_wr.java
> 
> If you keep the .java file and the .jar file in the same directory, you may 
> compile it using:
> 
> javac -classpath netcdfAll-4.2.jar Simple_xy_wr.java
> 
> Then, to run the file, execute:
> 
> java -cp netcdfAll-4.2.jar:. Simple_xy_wr
> 
> Notice that I've added '.' (i.e. the current directory) to the classpath.
> 
> For an example of using netcdf-Java to read a netcdf file, check out:
> 
> http://www.unidata.ucar.edu/software/netcdf/examples/programs/Simple_xy_rd.java
> 
> This example will read the file that Simple_xy_wr creates.
> 
> Cheers!
> 
> Sean
> 
> > Hi,
> >
> >
> >
> > I'm trying to write some java/html to display some statistics on a
> > webpage.  The statistics are stored in a NetCDF(v3) file and I've no
> > experience of writing or reading NetCDF files with Java.  Google and
> > intranet searches on this have bought up several Unidata and user
> > tutorials but even having read these I still can't work out how to
> > compile the example with javac.  The java script itself looks
> > straightforward enough so I'm sure once I can' compile the simple write
> > and read examples I can work from these develop my own code, it's just
> > compiling and running the examples in the first place.
> >
> >
> >
> > I've spoken to the java developers within my organisation who have been
> > helpful on Java in general but have little experience using NetCDF files
> > in Java.  Personally I've tried downloading the netcdf-2.2.20.jar,
> > netcdf-4.2.jar, netcdfAll-4.2.jar (which I think is unnecessary for my
> > needs).  Using a unix system these and the example are all stored in my
> > home directory and I've tried compiling using
> >
> >
> >
> > javac -classpath netcdf-2.2.20.jar CreateNetcdf.java
> >
> > javac -classpath netcdf-4.2.jar CreateNetcdf.java
> >
> > javac -classpath netcdfAll-4.2.jar CreateNetcdf.java
> >
> >
> >
> > All of which fail to find the ucar.Multiarray and ucar.netcdf packages
> > in the CreateNetcdf.java example.  I've also tried compiling this in
> > Eclipse with the external jars I named added but this still will not
> > work.  I could very well be missing something obvious as I'm relatively
> > new to java scripting, but after a fairly exhaustive google search of
> > all related websites I'm still unable to compile or run the example.
> > Any help with this would be much appreciated.
> >
> >
> >
> >
> >
> > Thanks,
> >
> > Owen
> >
> >
> >
> >
> >
> > Owen Cox  Scientist - Active Sensing
> > Met Office  Joint Centre for Mesoscale Meteorology (JCMM)
> > Meteorology Building University of Reading
> > PO Box 243 Earley Gate Reading   Berks  RG6 6BB  United Kingdom
> > Tel: +44 (0)118 378 7830  Fax: +44 (0)118 378 8791
> > Email: address@hidden  Website: www.metoffice.gov.uk
> >
> > See our guide to climate change at
> > http://www.metoffice.gov.uk/climatechange/guide/
> >
> > ________________________________
> >
> >
> >
> > Hi Owen,
> >
> >
> >
> > You basically need to tell the Java compiler the location of the JAR
> > file containing the NetCDF code.  This is achieved by including the
> > -classpath argument in your invocation of javac.  For example:
> >
> >
> >
> > javac -classpath /path/to/your/code:/path/to/netcdfcode/netcdf.jar
> > YourCode.java
> >
> >
> >
> > where /path/to/your/code is the directory containing your Java code, and
> > /path/to/netcdfcode/netcdf.jar is the location of the JAR file whose
> > code you are using in your source file.  This example is for a
> > Unix/Linue environment - syntax is slightly different if you use
> > Microsoft Windows.
> >
> >
> >
> > If you google for something like "adding jar files classpath javac" you
> > will find hundreds of examples.  You're not the first person to ask this
> > question!
> >
> >
> >
> > Like Colin, I have never dealt with NetCDF so can't advise on this
> > aspect.  However I'm happy to advise on any Java-specific problems you
> > may encounter.
> >
> >
> >
> > Compiling Java programs can be a complex process, something that a good
> > IDE will handle for you.  Therefore I strongly advise that you obtain
> > and familiarise yourself with an IDE (such as Eclipse) before embarking
> > on Java development.
> >
> >
> >
> > I hope this reply is of some use.
> >
> >
> >
> > Regards,
> >
> > Niall.
> >
> > Niall Hosiene  Senior IT Practitioner
> > Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB  United Kingdom
> > Tel: +44 (0)1392 884145  Fax: +44 (0)1392 885681  Mobile: +44 (0)7707
> > 141741
> > Email: address@hidden
> > <mailto:address@hidden>   Website:
> > http://www.metoffice.gov.uk <http://www.metoffice.gov.uk/>
> >
> > See our guide to climate change at
> > http://www.metoffice.gov.uk/climate-change
> >
> >
> >
> > ________________________________
> >
> > From: Smith, Colin A
> > Sent: 15 July 2011 10:08
> > To: Cox, Owen; Hosiene, Niall
> > Subject: RE: NetCDF-Java in the office
> >
> > owen
> >
> >
> >
> > I have not dealt with NetCDF so I cannot help you on that.
> >
> >
> >
> > hopefully niall can help you with adding your jar on the command line.
> >
> > Colin A Smith
> > Senior IT Practitioner
> > Met Office FitzRoy Road Exeter Devon EX1 3PB U.K.
> > Tel: +44 (0)1392 886860
> > Website: www.metoffice.gov.uk
> >
> >
> >
> >
> >
> > ________________________________
> >
> > From: Cox, Owen
> > Sent: 15 July 2011 09:52
> > To: Smith, Colin A; Hosiene, Niall
> > Subject: FW: NetCDF-Java in the office
> >
> > Hi both,
> >
> >
> >
> > I emailed Sheila Needham with a question about how to compile the Java
> > NetCDF examples in the office (please see the message below for more
> > details) and she suggested that either of you may be able to help.
> > Basically I'm trying to display some statistics on a Metnet page, but
> > this involves reading some numbers from a simple NetCDF file.  I'm only
> > just starting to use Java but I'm pretty confident that once I can
> > compile the write and read examples from Unidata's website I'll be able
> > to develop the script I need from here on.  Sheila suggested contacting
> > either of you, and also adding the netcdf jar to my class path when I
> > try compiling with javac.  I'd tried this suggestion at home without
> > success, although I've not tried in the office since I wasn't sure where
> > the netcdfAll-*.*.jar was stored.
> >
> >
> >
> > Any help would be appreciated.
> >
> >
> >
> > Thanks,
> >
> > Owen
> >
> >
> >
> > Owen Cox  Scientist - Active Sensing
> > Met Office  Joint Centre for Mesoscale Meteorology (JCMM)
> > Meteorology Building University of Reading
> > PO Box 243 Earley Gate Reading   Berks  RG6 6BB  United Kingdom
> > Tel: +44 (0)118 378 7830  Fax: +44 (0)118 378 8791
> > Email: address@hidden  Website: www.metoffice.gov.uk
> >
> > See our guide to climate change at
> > http://www.metoffice.gov.uk/climatechange/guide/
> >
> > ________________________________
> >
> > From: Needham, Sheila
> > Sent: 15 July 2011 09:43
> > To: Cox, Owen
> > Subject: RE: NetCDF-Java in the office
> >
> >
> >
> > Hi Owen,
> >
> >
> >
> > 'Fraid I can't really help you.  I haven't done much Java since this and
> > what I have done has always been with an IDE so I haven't used javac
> > from the command line.  Have you put the netcdf jar file in your
> > classpath?  That's all I can think of.
> >
> >
> >
> > Colin Smith or Niall Hosiene are both experienced Java developers who
> > might be willing to help you.
> >
> >
> >
> > Regards,
> >
> > Sheila
> >
> > Sheila Needham  Senior Software Developer
> > Met Office FitzRoy Road Exeter EX1 3PB United Kingdom
> > Tel: +44 (0)1626 363489
> > E-mail: address@hidden Website:
> > http://www.metoffice.gov.uk <http://www.metoffice.gov.uk/>
> >
> > See our guide to climate change at
> > http://www.metoffice.gov.uk/climatechange
> >
> >
> >
> >
> >
> > ________________________________
> >
> > From: Cox, Owen
> > Sent: 15 July 2011 09:17
> > To: Needham, Sheila
> > Subject: NetCDF-Java in the office
> >
> > Hi Sheila,
> >
> >
> >
> > I'm trying to write some java/html to display some statistics on a
> > Metnet page.  Unfortunately the statistics are stored in a NetCDF(v3)
> > file and I've no experience of writing or reading NetCDF files with
> > Java.  A Metnet search on this bought up a document you wrote in 2008,
> > "Writing an IO Service Provider for NetCDF-Java Version 3".  I followed
> > the links in this doc to the Unidata website which had some simple
> > examples such as WriteNetcdf.java, but even following your document and
> > Unidata's tutorials I can't work out how to compile the example with
> > javac.  The java script itself looks straightforward enough so I'm sure
> > once I can' compile the simple write and read examples I can work from
> > these develop my own code, it's just compiling and running the examples
> > in the first place.
> >
> >
> >
> > Would this be something you know how to do, or might be able to advise
> > me whom in the office to contact on this?  Apologies if you're not
> > working in this field anymore (always a danger when MetNet searches are
> > involved) but I was concerned a Remedy request wouldn't find it's way to
> > the correct group so thought I'd try contacting you directly first.
> >
> >
> >
> > Thanks,
> >
> > Owen
> >
> >
> >
> > Owen Cox  Scientist - Active Sensing
> > Met Office  Joint Centre for Mesoscale Meteorology (JCMM)
> > Meteorology Building University of Reading
> > PO Box 243 Earley Gate Reading   Berks  RG6 6BB  United Kingdom
> > Tel: +44 (0)118 378 7830  Fax: +44 (0)118 378 8791
> > Email: address@hidden  Website: www.metoffice.gov.uk
> >
> > See our guide to climate change at
> > http://www.metoffice.gov.uk/climatechange/guide/
> >
> >
> >
> >
> >
> >
> >
> >
> >
> 


Ticket Details
===================
Ticket ID: ALR-856518
Department: Support netCDF Java
Priority: High
Status: Open