Chief Delphi - file i/o in java

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amk	06-04-2010 14:09

file i/o in java

Does anyone have example code for how to open and write to a text file on the cRIO? We would like to write out information while the robot for debugging purposes, then ftp the file to a laptop for viewing. Any help is appreciated.

Robototes2412

06-04-2010 17:49

Re: file i/o in java

if i remember right, they removed that feature from java, i suggest writing a class in c++ then use JNA to call it

rrossbach

06-04-2010 20:37

Re: file i/o in java

Quote:

Originally Posted by amk (Post 949248)

Take a look at my post here for an example.

- Ron
Team #2607 controls mentor

derekwhite

07-04-2010 23:20

Re: file i/o in java

I'll second Ron's approach.

As an FYI, once you have an OutputStream to the file, you can wrap it with a PrintStream and use the typical print methods on the file.

Quote:

PrintStream out;
DataOutputStream theFile;
FileConnection fc;

try {
fc = (FileConnection)Connector.open("file:///output.txt", Connector.WRITE);
fc.create();
theFile = fc.openDataOutputStream();
out = new PrintStream(theFile);
} catch (Exception e) {
...
}

spartango

08-04-2010 02:49

Re: file i/o in java

See
http://code.google.com/p/grtframewor...GRTFileIO.java

You can use that file verbatim or copy it and use its innards in your code.

Robototes2412

08-04-2010 13:20

Re: file i/o in java

THanks, is there anyway to append to a file?

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