问题
Following on from my previous question, I was wondering if anyone knew of any free (as in beer, as in freedom would be nice but not essential) math(s) parsing libraries for Java. I found one called Jep which used to be open-source (ie: written by the community), but now costs $300 upwards (is this even legal?).
Any help appreciated!
回答1:
You can try the math expression parser from my Symja project.
回答2:
You may find my math expression evaluator useful; it's completely free and it's tiny.
回答3:
i released an expression evaluator based on Dijkstra's Shunting Yard algorithm, under the terms of the Apache License 2.0:
http://projects.congrace.de/exp4j/index.html
回答4:
I may just be daft but isn’t the old, GPL’ed Jep still available as open source?
来源：https://stackoverflow.com/questions/1792261/java-maths-parsing-api