retrieving value from multi dimensional array by it's index in java

Question

I have an array like this:

0  1  2
3  4  5
6  7  8

these numbers are indices of this array

this array has been initialized with:

1,1  3,1  5,1
1,3  3,3  5,3
1,5  3,5  5,5

which these numbers are the coordinate of the grid(the value inside my array). so my question is that, what should i do if i want to retrieve the value of one cell by it's index, for example if i call a method like getValue(5); the result would be 5,3. i know how to get the value in multi dimentional array but i don't know how to get taht with it's index.

Thank you

Neel · Accepted Answer · 2014-04-08 19:49:43Z

1

yourArray[5] gives a one dimensional array containing 5 and 3.

Edit: To address your comment.

function customIndex(int i) {
    return myArray[Math.floor(i/3)][i%3];
}

edited Apr 8, 2014 at 19:49

answered Apr 8, 2014 at 19:33

Neel

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2 Comments

faranak777 Over a year ago

hmmmm but i don't have 5 rows right? i mean by calling myArray[5] i think the one dimensional array in row 5 will return, please correct me if i'm wrong. i think myArray[1][2] should give me 5,3 but i want just 1 int to call them like myArray[5].

Neel Over a year ago

You said that those numbers were the indices of your array. In the situation you're describing, you just need a function like function customIndex(int i) { return myArray[Math.floor(i/3)][i%3]; }

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