Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in the text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The corresponding Java main() must be put in a class."

A block of code is set as follows:

procedure main(argv)
   simple := simple()
   yyin := open(argv[1])
   while i := yylex() do
      write(yytext, ": ", i)
end 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

MethodHeader: PUBLIC STATIC MethodReturnVal
                               MethodDeclarator {
  $$=j0.node("MethodHeader",1070,$3,$4);
  j0.calctype($$);
}; 

Any command-line input or output is written as follows:

$ jflex nnws.l
$ javac simple 	.java yylex.java

Bold: Indicates a new term, an important word, or words that you see on screen. For instance, words in menus or dialog boxes appear in bold. Here is an example: "Select System info from the Administration panel."

Tips or Important Notes

Appear like this.