Franz:
I will answer as many questions as I can:
1. The memory required for a 4x3 array of int would be 4 bytes per integer
x 4 x 3 = 48 bytes total.
2. The easiest way to fill a 3D array like that would probably be with
nested-for loops. ie:
for (int i = 0; i < 50; i++) {
for (int j = 0; j < 128; j++) {
for (int k = 0; k < 256; k++) {
num[i][j][k] = ...
}
}
}
3. I can't think of an easy way to explain this one. A two-dimensional
array is an "array of arrays" (for example, from question #1, an array of 4
arrays of 3 int's). A 3D array is an expansion from that (an array of
arrays of arrays). Sorry, I can't think of another way to say that.
4. I prefer to think of that situation as 50 rows, 128 columns and
256 "layers". If you think of a box sitting on the floor, the length of the
box would be, for example, the rows (say 50), the width of the box would be
the columns (128), and the third number would be how far off of the floor
(256). Don't know if that helps or not, but that's how I picture it.
5. How much memory is consumed would depend on the values that you are
storing in the array. It would be (50x128x256) x the size of the type of
data you're storing (4 for int, 1 for boolean, etc.).
6. I can't help you on this one. I haven't gotten up to GUI or AWT yet.
Cheers!
Eric
On Feb 22, 2009 7:34am, franzgabriel <[email protected]> wrote:
> Somebody help me please, I still struggling to understand array multi
> Dimension,
> My question is :
> 1. if I create 2 dimensional array 4 x 3 and the data type integer in
> 32 bit computer how much memory will consume? Is it still only 4 byte
> or become doubler ??
> 2. how to fill values in row & column after initialized fixed
> dimension size in 3 D array:
> int [ ][ ][ ] num;
> num = new int [50][128][256];
> 3. What does it means 50 x 128 x 256 in array 3 D?
> 4. in array 3D 50 is become Row, 128 is column, and the 256 is column,
> Is it right?
> 5. from above no.3 question the total is 1.651.200 field to store data
> value, How much a memory will consume?
> 6. What does array use for in our java programming actually in GUI
> (AWT)?? only store a value or any different purpose?
>
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