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How does JavaCC compare with Lex and Flex?

April 26, 2017compare Flex javacc lex

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How does JavaCC compare with Lex and Flex?

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Lex is the lexical analyzer supplied for many years with most versions of Unix. Flex is a freely distributable relative associated with the GNU project. JavaCC and lex/flex are actually quite similar. Both work essentially the same way, turning a set of regular expressions into a big finite state automaton and use the same rules (for example the maximal munch rule). The big difference is the lex and flex produce C, whereas JavaCC produces Java.