J2ME : parseInt is slow, faster ways to load data from text files ?

[Sam Iam]

On my J2ME phone I've found that parsing a few hundred comma seperated
numeric values will take up to five seconds.

I think it's because parseInt is slow.

Is there some other faster way to load up a bunch of values into
arrays of ints ?

- Sam.

 

[Liz]

jni
do it in c

 

[Roedy Green]

Is there some other faster way to load up a bunch of values into
arrays of ints ?

You might try my http://mindprod.com/products.html#CSV class to read
the csv file.

If you want it really fast, convert the data to binary and read it
with DataInputStream or LEDataInputStream

See http://mindprod.com/jgloss/ledatastream.html

Try bumping up the buffer size.
see http://mindprod.com/jgloss/fileio.html


Profile to see where the bottleneck REALLY is.

http://mindprod.com/jgloss/profiler.html

 

[Darryl L. Pierce]

On my J2ME phone I've found that parsing a few hundred comma seperated
numeric values will take up to five seconds.

I think it's because parseInt is slow.

Is there some other faster way to load up a bunch of values into
arrays of ints ?

If you have control of the data source, why not just write the data using a
DataOutputStream? Then you could read the data in using a DataInputStream.

 

[Darryl L. Pierce]

jni
do it in c

Notice the OP was asking about J2ME (meaning the MIDP). JNI is not an
option.

 

[Sam Iam]

On my J2ME phone I've found that parsing a few hundred comma seperated
numeric values will take up to five seconds.

I think it's because parseInt is slow.

Is there some other faster way to load up a bunch of values into
arrays of ints ?

- Sam.

Thanks to Roedy & Darryl for their suggestion of switching to binary &
using DataInputStream.

I'm able to load numbers from my data file 10X faster now.

- Sam.

 

[satdmail]

hi,
i am doing one j2me application, that needs to convert the text format into binary format,
please advise me how to do that?
thanks & regards,
satdmail