achieve the parserTD partially
achieve the part of error code and some code in frontend, finally for the code in the pascal.java for parsermessagelistener
achieve the error handler code in frontend
achieve the pascalstringtoken and pascalwordtoken
achieve the pascalerrortoken.java
achieve the stringtoken errortoken numbertoken specialsymbol wordtoken
revise the part of the pascaltokentype
achieve the part of the compiler and interpreter package
achieve the token part of the compiler