Atlassian - Issue & Project Tracking Software

In Current market Atlassian is the major project tracking software using by all software companies.
We must  know, what is this software and what is the main purpose of this in real time world. Actually a normal software developer can develop code using MyEclipse or NetBeans IDEs. Then he can commits the code using SVN or CVS. Once he committs the code each file can get a version number in repository.If you want to check which line of code we modified or added or removed we don't know.again we should compare from history. But in Atlassin fisheye we can find all the changes you committed and which line deleted and which line committed, we can find easily with colors. Atlassian reduces developer efforts and reduces time all the things automated by atlassian once the code committed to repository.

Actually this software contains several products with in this to tack the issues and maintenance the software in the normal software companies.

Addition or Sum of 2x2 matrix using Arrays in java

We know that arrays are different types, as usual one dimensional array, two dimensional array, three and multi (mxn) dimensional arrays.
In two dimensional arrays we need 2x2 array.

A 2x2 matrix is a rectangular often square array of numbers having 2 columns and 2 rows, or expressions which can be evaluated to numbers. The dimensions m x n refer to the number of rows (m) and columns (n) respectively.

We can declare the one dimensional array as:

int[] myArray = {0,1,2,3};

and two dimensional array looks like this:

 int[][] myArray = { {0,1,2,3}, {3,2,1,0}, {3,5,6,1}, {3,8,3,4} };