Could not find or load main class com.google.zxing.client.j2se.CommandLineRunner

[BrandonCopley]

I am getting this error when trying to run this code - it appears zxing is installed:

computer$ java -cp javase/javase.jar:core/core.jar com.google.zxing.client.j2se.CommandLineRunner
Decode barcode images using the ZXing library

usage: CommandLineRunner { file | dir | url } [ options ]
--try_harder: Use the TRY_HARDER hint, default is normal (mobile) mode
--pure_barcode: Input image is a pure monochrome barcode image, not a photo
--products_only: Only decode the UPC and EAN families of barcodes
--dump_results: Write the decoded contents to input.txt
--dump_black_point: Compare black point algorithms as input.mono.png
--crop=left,top,width,height: Only examine cropped region of input image(s)

[BrandonCopley]

It appears I just don't know that much about java - I need to find where zxing got installed.

[brianwanjir]

Did you ever find a solution to this issue?

[Manouchehri]

@BrandonCopley: Were you running python-zxing on Windows or Linux?

[BrandonCopley]

I am running this on Mac (Unix). However, it's been a long time since I've looked into this.

[Manouchehri]

Hmm, odd. The path separator should be the same on OS X as Linux, or at least I thought it was. What folders do/did you install zxing to?

[brianwanjir]

I installed the zxing to c:/zxing/"this is where the core and javase
subdirectories are with the respective .jar files
and python zing to C:/Python27/Lib/site-packages/zxing

On Wed, Aug 12, 2015 at 1:34 PM, David Manouchehri <notifications@github.com

wrote:

Hmm, odd. The path separator should be the same on OS X as Linux, or at
least I thought it was. What folders do/did you install zxing to?

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[Manouchehri]

@BrandonCopley: Let me know if you have a chance to try it out again on OS X. I've removed all of the hard-coded separators, which should fix it. I might still be overlooking something.

https://github.com/Manouchehri/python-zxing/tree/osx (I haven't tried my last commit, I wrote it on my tablet; should work though.)

I'll probably get around to setting up a quick unit test to run on Travis CI as well.

[chuckytah]

Hello, the link https://github.com/Manouchehri/python-zxing/tree/osx is leading to a 404 error...

I am also getting this error "Error: Could not find or load main class com.google.zxing.client.j2se.CommandLineRunner" too when run the follow script:

from zxing import *
reader = BarCodeReader()
barcode = reader.decode("barcode_01 roi_1.jpg")
print barcode

Error: Could not find or load main class com.google.zxing.client.j2se.CommandLineRunner
<zxing.BarCode instance at 0x10ad71cb0>

I am on Mac... what could I do to fix it?

[ankita-kumari]

I think you are not specifying the path were zxing is installed.
You need to instantiate a reader as follows :
reader = BarCodeReader('<path where the zxing folder is present>')
If everything else was right, this should do it. :)

[Manouchehri]

@chuckytah Ugh, that was my mistake... I deleted the branch since I thought I had already merged in the changes; turns out I didn't.

I'll have to poke at this again later.

[chuckytah]

Well i have used zbar now. I was able to use zxing but it was taking too
much time to decode the barcode.

Thanks anyway. Keep the good working.

Ines
Em 19/01/2016 20:02, "David Manouchehri" notifications@github.com
escreveu:

@chuckytah https://github.com/chuckytah Ugh, that was my mistake... I
deleted the branch since I thought I had already merged in the changes;
turns out I didn't.

I'll have to poke at this again later.

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.

[BrandonCopley]

@Manouchehri This is so far in the past I have no idea what I was even trying to do here or use this library for, I apologize.

[feliciaamy]

I have the same issue, I put my python script in zxing/javase/python-zxing/ and didn't put any location when I initiate the BarCodeReader. Is there any solution for this?

[alanrgan]

I got it to work by changing the following lines in __init__.py

libs = ["javase/javase.jar", "core/core.jar"]
args = ["-cp", "LIBS", "com.google.zxing.client.j2se.CommandLineRunner"]

to

libs = ["javase/javase.jar"]
args = ["-jar", "LIBS"]

and then I ran mvn -DskipTests package assembly:single in the javase/ directory.

Also @feliciaamy, BarCodeReader looks for the parent directory of javase/, so you need to initiate BarCodeReader with the path to zxing/.