cannot execute the file preprocessing.py completely

[radhikagupta6]

LookupError Traceback (most recent call last)
in ()
9 e1_text = text
10 e1_text_ = " ".join(e1_text)
---> 11 e1_text = tokenizer.tokenize(e1_text)
12 text.append(t[0])
13 e11= t[0]

F:\anaconda\lib\site-packages\nltk\tokenize\stanford.py in tokenize(self, s)
85 """
86 cmd = ['edu.stanford.nlp.process.PTBTokenizer']
---> 87 return self._parse_tokenized_output(self._execute(cmd, s))
88
89 def execute(self, cmd, input, verbose=False):

F:\anaconda\lib\site-packages\nltk\tokenize\stanford.py in execute(self, cmd, input, verbose)
97
98 # Configure java.
---> 99 config_java(options=self.java_options, verbose=verbose)
100
101 # Windows is incompatible with NamedTemporaryFile() without passing in delete=False.

F:\anaconda\lib\site-packages\nltk\internals.py in config_java(bin, options, verbose)
60 env_vars=['JAVAHOME', 'JAVA_HOME'],
61 verbose=verbose,
---> 62 binary_names=['java.exe'],
63 )
64

F:\anaconda\lib\site-packages\nltk\internals.py in find_binary(name, path_to_bin, env_vars, searchpath, binary_names, url, verbose)
695 return next(
696 find_binary_iter(
--> 697 name, path_to_bin, env_vars, searchpath, binary_names, url, verbose
698 )
699 )

F:\anaconda\lib\site-packages\nltk\internals.py in find_binary_iter(name, path_to_bin, env_vars, searchpath, binary_names, url, verbose)
679 """
680 for file in find_file_iter(
--> 681 path_to_bin or name, env_vars, searchpath, binary_names, url, verbose
682 ):
683 yield file

F:\anaconda\lib\site-packages\nltk\internals.py in find_file_iter(filename, env_vars, searchpath, file_names, url, verbose, finding_dir)
637 msg += '\n\n For more information on %s, see:\n <%s>' % (filename, url)
638 div = '=' * 75
--> 639 raise LookupError('\n\n%s\n%s\n%s' % (div, msg, div))
640
641

LookupError:

===========================================================================
NLTK was unable to find the java file!
Use software specific configuration paramaters or set the JAVAHOME environment variable.