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Basic Array Functions

Posted on 2006-11-20
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Last Modified: 2010-03-31
Hi,

I would like to know how to get the value of the position of the array..

E.g.
arr[i][j]

How would I get the value of the "i" and the "j" into a variable (two seperate ones)?

Note I don't want to know what the [i][j] have been assigned, but rather than the actual numerical value of "i" and "j"...

Thanks
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Question by:vrameen
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6 Comments
 
LVL 86

Accepted Solution

by:
CEHJ earned 2000 total points
ID: 17979101
>>How would I get the value of the "i" and the "j" into a variable (two seperate ones)?

i is an array
j is a variable

int[] row = arr[i];
int n = arr[i][j];
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Author Comment

by:vrameen
ID: 17979217
I don't really understand..

To clarify my question...

arr[i][j] is a 2d array...

Say the array is now at arr[3][12] and arr[3][12] = "hello";
I want to get the number "3" and the number "12" into two separate variables..
I'm not interested in getting the string "hello", but rather the array numbers into the variable.

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LVL 16

Expert Comment

by:Peter Kwan
ID: 17979238
vrameen,

Are you wanting the upperbound that the 2d array is filled in?
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LVL 86

Expert Comment

by:CEHJ
ID: 17979590
>>but rather the array numbers into the variable.

But they're already in variables i and j ..?

You can of course copy them

int x = i;
int y = j;
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LVL 23

Expert Comment

by:Ajay-Singh
ID: 17980531
If you are looking for the position where the array value is "hello", you can search for it

int x = -1;
int y = -1;

for(int i=0; i<arr.length; i++) {
    for(int j=0; i<arr[i].length; j++) {
        if("hello".equals(arr[i][j])) {
            x = i;
            y = j;
            break;
        }
    }
}


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LVL 86

Expert Comment

by:CEHJ
ID: 18037612
:-)
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