Java programming best diploma summary notes

Java programming.




Java IO System

, Java IO system



 Java IO system is concerned with getting Input from the
Keyboard
 The objective of this system is to make a java program an
interactive program

,Terminology

 Token: String of characters separated by delimiting
character
 A token can be a block of text or a single symbol e.g a
reserved word (such as int or while), an identifier (such
as b or sum), a constant (such as 25 or "Alice in
Wonderland"), a delimiter (such as { or ;) or an operator
(such as + or =).
 Parsing the string: The division of text into a set of
discrete parts, or tokens, which in a certain sequence can
convey a semantic meaning. The Class StringTokenizer is
used to parse strings

, Terminology

 A Delimiter: a character used to separate items of data stored
on a computer.
 It is used to tell computers to finish processing one piece of
data and move on to the next one.
 Most delimiters are characters that will not be used in the
data, such as spaces or commas.
 Java use Whitespace by default space
 Examples of white space characters include: tab, newline and
space