Innovative parser construction method and parser generator prototype generates a computer language parser from a set of annotated classes in contrast to classic parser generators which specify concrete syntax of a computer language using BNF notation.The process of parser implementation ispresented on selected concrete computer language.By using computer languages, define the structure of a system and its behavior. Today's common industry practice is to create a software system as a composition of software artifacts written in more than one computer language. Besides the general purpose programming languages (e. g. Java, C#) the domain-specific languages (DSL) Nowadays, DSLs have their stable position in the development of software systems in many different forms. Concerning abstraction level, it is possible to program closer to a domain.