UNICODE letter(combination) frequency counter

    /*Author Shaha Hassan
     *date 16/11/2014
     * GNU License, feel free to do whatever with the code, as long as you give me Shaha Hassan the credit for the code.
     *
     * This program was written to count the occurances of UNICODE letters, or their combinations(2 and 3 char long).
     * It can be used to find what letter occurs the most in a language, or what combinations of letters occur the most.
     * A user can input what UNICODE characters are he wants to focus on in a file and the text to be analysed in another.
     * The program then reads the text file, counts the number of occurences of combinations of consecutive required unicode characters
     * and lists them in descending order.
     */

    /*
     * this project is in java and has 4 files
     * Driver    http://pastebin.com/ZWBeq6MV
     * Matrix    http://pastebin.com/SypU8jJe
     * Map	 http://pastebin.com/Z5M7aSJ1
     * Documentation
     * this one is Documentation.txt (search though my pastes to find the other files.)
     */




--------Default values for file names are---------------------
Input files
input file		D:\in.txt
char-set		D:\set.txt

Output files(auto generated)
out1combo		D:\out1.txt
out2combo		D:\out2.txt
out3combo		D:\out3.txt

recommended is the default names
so type a period (.) if prompted for filenames to use these default values.
--------------------------------------------------------------
--------Providing user's filenames----------
To input filename please provide full filenames with path, WITHOUT EXTENSION
Donot use spaces in folder names
Eg if input file is
E:\My_folder\novel.txt
type
E:\My_folder\novel

Similarly for other files.
For output file 1, 2, 3 will be suffixed automatically. If you type
E:\file
it will generate the files
file1.txt, file2.txt, file3.txt
-======================================================


--------character set file format-------------------------
set.txt shoould strictly follow the following format:
Each line begins with (tilde)~   or (capsign)^
and the list line should contain simply one asterisk(*).

-----------Range (~)
tilde means the set characters are from char1 to char2(both inclusive)
A line beginning with ~ should have just two characters, and end with newline(ascii val 13)
Note: unicode value of char1 should be less than that of char2

	Syntax:
	~char1char2

Example:
~ch
	--includes character from c to h. cdefgh
~VZ
	--includes VWXYZ


------------Individual chars(^)
A line beginning with ^ should contain atleast one character.
All the characters in this line will be included in the set.

	Syntax:
	^charlist

Example:
^,
	--comma will be included
^pl%d v
	--characters p,l,%,d,<space> and v will be included.

asterisk
the last line must be an asterisk. Anything following asterisk will simply be ignored.
So you can write comment, notes, descriptions, love letters here.

--------------------------EG of set files
~ad
^yfB
~GJ
~NP
*
these chars will be included a,b,c,d, y,f,B,  G,H,I,J, N,O,P.
All the unicode characters (( minus whitespace) ++actual space) are allowed.
-------------------------------------------
~16
*
digits 1 to 6
-----------
~az
~AZ
^., +-
~09
*
will contain all the alphabet and digits and .,+- and space
----------
~10
*
is WRONG. Since value of 1 is greater than that of 0.


Note: The number and order of lines containing ^ and ~ does not matter.
But lines starting with ~ should have exactly 2char
lines starting with * should have atleast 1 char