Problem with launching a server

[Qin Lizzy]

I tried both python corenlp/corenlp.py and python corenlp/corenlp.py -H 0.0.0.0 -p 3456 , but I got this error:

pexpect.exceptions.ExceptionPexpect: The command was not found or was not executable: java. Exception AttributeError: "StanfordCoreNLP instance has no attribute 'corenlp'" in <bound method StanfordCoreNLP.del of <main.StanfordCoreNLP instance at 0x7fc63552cb90>> ignored

I want to know how to solve this error. Thanks.