Return specific value from a 2D array

Question

I'm trying to figure out a way to return the value from a specific position inside a 2D array in JAVA. I've been searching for hours. I might be tired, or using the wrong terms but I can't find anything useful so far...

So for example I have a variable "a" and I want it to receive the value that is contained at a specific array position.

So for example, I want the value contained at the position :

array[1][1]

To be saved into the variable "a". Any way to do this? Btw it's a 9x9 array so it contains 81 different value but I only need 1 specific value out of the array at a time.

Thanks in advance!

what type of array is this? assuming int array... int a = array[1][1] if you have a already declared just do.. a = array[1][1] — 3kings
– 3kings, Commented Aug 6, 2016 at 21:51
When I do this, the variable a always gets the value 0... but yes it is an INT array — itSp4x
– itSp4x, Commented Aug 6, 2016 at 21:53
Would you like to loop through every element in the array?... You're question is confusing and the added comment makes me more confused.. — 3kings
– 3kings, Commented Aug 6, 2016 at 21:54
@itSp4x If it's 0 then that's because that's what the value is. Can you show what you're trying to do? — castletheperson
– castletheperson, Commented Aug 6, 2016 at 21:56
@itSp4x how is the array initialized? Please post your code. — Aaron Davis
– Aaron Davis, Commented Aug 6, 2016 at 21:56

Aaron Davis · Accepted Answer · 2016-08-06 22:01:42Z

1

You just assign the value from the array as desired:

public class Foo {
    public static void main(String[] args) {
        int[][] arr = {{1,2,3},{4,5,6},{7,8,9}};
        int a = arr[1][1];
        System.out.println(a);
    }
}

// outputs : 5

Note that if a value hasn't been put in an array position then it will be in the uninitialized state. For an int this is 0.

int[][] arr = new int[9][9];
// all values in arr will be 0

answered Aug 6, 2016 at 22:01

Aaron Davis

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1 Comment

itSp4x Over a year ago

Thanks this does exactly what I needed!

Lightning Lord · Accepted Answer · 2016-08-06 21:54:01Z

0

Depending on the "Object type" you would assign using Object a = array[1][1]; and you can be more specific, as in int a = array[1][1];. GL

answered Aug 6, 2016 at 21:54

Lightning Lord

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