Introduction - If you have any usage issues, please Google them yourself
Subset of the Java language syntax, semantics parser implements a subset of the Java language grammar <Sw> while (Er) S <Er> <S> </s> Vc < Vc | Vc> Vc <S>identifier = Ex // identifier using the results of lexical analysis to identify</s> <Vc> <S> identifier | integer constant// identifier, the entire number of recognition results using the lexical analysis</s> <Ex> <S> Vc P Ex | Vc</s> <P> <S> + |-|*|/// operator must comply with the precedence and associativity</s>