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https://issues.apache.org/jira/browse/JOSHUA-221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15428114#comment-15428114
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Matt Post commented on JOSHUA-221:
----------------------------------

That's done so that the same framework can be used to parse both the config 
file and the command line options. The goal is that there are hard-coded 
defaults, which can be overridden by parameters in the config file, which in 
turn can be overridden by the command line. 

I haven't looked into different frameworks, but I do want to be able to 
override any config-file parameter from the command line using the same names.

> ArrayIndexOutOfBoundsException when passing arguments to JoshuaDecoder.main
> ---------------------------------------------------------------------------
>
>                 Key: JOSHUA-221
>                 URL: https://issues.apache.org/jira/browse/JOSHUA-221
>             Project: Joshua
>          Issue Type: Bug
>            Reporter: Lewis John McGibbney
>             Fix For: 6.2
>
>
> {code}
> lmcgibbn@LMC-032857 /usr/local/joshua(master) $ java -jar class/joshua.jar 
> -version
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
>       at joshua.decoder.ArgsParser.<init>(ArgsParser.java:43)
>       at joshua.decoder.JoshuaDecoder.main(JoshuaDecoder.java:30)
> lmcgibbn@LMC-032857 /usr/local/joshua(master) $ java -jar class/joshua.jar 
> -version -v
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
>       at joshua.decoder.ArgsParser.<init>(ArgsParser.java:43)
>       at joshua.decoder.JoshuaDecoder.main(JoshuaDecoder.java:30)
> {code}



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