This program finds Firsts and Follows for every symbol in a given grammar. This is a desktop application with Java UI Swing, allows you to enter a grammar, then it gives you firsts and follows of the nonTerminal symbols used in the rules of the grammar.

There are two parts of the program, one for symbols declaration (Terminal and nonTerminal), and second for rules of the grammar.

You should declare all the symbols of the grammar, and define the type of the symbol as well (t: Terminal, n_t: nonTerminal).

In this section, you have to define the rules of the grammar, use "." for concatenation, and "|" for alternation

Click the execute button after entering all the rules, and a pop up window will show up with all the firsts and follows of the nonTerminal symbols.