Java design Mode _ (Behavioral) _ Parser mode __java

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Given a language, defines a representation of its grammar, and defines an interpreter that uses the representation to interpret a sentence in a language and belongs to a behavior class pattern.

Interpreter is a simple syntax analysis tool, its most significant advantage is extensibility, modify grammar rules only need to modify the corresponding non-terminal can be, if extended syntax, only need to increase the non-terminal class on it.

refer to the connection article specifically

Http://www.cnblogs.com/SamFlynn/p/4501154.html