NLTK fails to find the Java executable

Asked 2011-09-13T15:46:27.437

I am using NLTK's nltk.tag.stanford, which needs to call the java executable.

I set JAVAHOME to C:\Program Files\Java\jdk1.6.0_25 where my jdk is installed, but when run the program I get the error

"NLTK was unable to find the java executable! Use the config_java() or set the JAVAHOME variable"

Then I spent 3 hours on debugging it and tried

config_java("C:/Program Files/Java/jdk1.6.0_25/")

config_java("C:/Program Files/Java/jdk1.6.0_25/bin/")
and those without the ending "/".

However the nltk still cannot find it.

Anyone has idea about what's going wrong? Thanks a loooot!

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2 Answers

Another possibility when facing this error message while using the stanford package in NLTK is if you use StanfordTagger instead of PosTagger or NERTagger. According to Google Groups, there was a design to encourage users away from the general StanfordTagger class and towards one of the two specific taggers.

answered 2013-01-22T13:43:37.333

Hopefully this saves someone else some time when trying to fix this problem. I'm pretty new to programming, Python and the NLTK, and didn't realize when I was trying to implement @dduhaime's solution that there are two 'internals.py' files: one in the nltk folder (path=C:\nltk-2.0.4 on my computer) and one in my Python27 folder (path=C:\Python27\Lib\site-packages\nltk-2.0.4-py2.7.egg\nltk on my computer). You have to add the path to the java directory on lines 69 & 72 in the latter 'internals.py' file, or the NLTK will still not be able to find it.

My environment: Windows 7 64 bit, NLTK build 2.0.4

answered 2013-07-11T18:29:01.923

NLTK fails to find the Java executable

2 Answers

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