ILexical and Syntax Project

Java Syntax $($Subset$)$

Programming Language

The first part of this project is to design and implement a Lexical Analyzer for a subset of the Java Programming Language. Your program should be able to accept as input a file containing statements in Java and correctly perform a lexical analysis of each statement. YOU JUST NEED TO USE THE WORDS INCLUDED IN THE TEXT FILE. YOU CAN NAME YOUR OWN $$TOKENS$$ FOR THE $$LEXEMES$.$

Samples of the output and sample C code for a lexical analyzer for tokens and lexemes can be found in the textbook Chapter $4\mathrm{.}2.$ You don$$t have to use the nmeric codes from the book; you can use your own $$tokens$.$

$1.$ You will need to create a list $($some structure to store$)$ of the reserved words for Java that will be needed for an $$if$-$else$$ type of conditional branch statement. $($We worked on the BNF$/$EBNF in class.$)$

$2.$ You will need to create a list of various operators used in Java by category, for example

token ASSIGN$\_$OP

lexeme $=$

$3.$ You will need to create a list of acceptable characters for variables and constants.$($Again$,$ just for the code given to you, including a couple of identifiers that don$$t work!$)$

$4.$ You will need to write code to test the validity of identifiers $($like the state diagrams from class$).$ If a string does not match any of the categories, you should indicate that as UNKNOWN.