2D array and coordinate values

frankpuppa

Hello there, I'm trying to save inside a 2d array some coordinates of the the processing frame. For instance: I have my array of int positions[][] and I would like to initialize it with my values(75,300,525) (75,300,525). and the scan through them while I need it with a nested loop. In fact the point I need are:75-75,75-30,75-525 and so on.. So for example:

positions[0][0]={{75},{75}}
positions[0][1]={{75},{300}}
positions[0][2]={{75},{525}}

but unfortunately it doesn't work. When I print the values it's completely messed up and I get values like this:[I@1de498 [I@8ae45a

I know it could be done easily using 2 single arrays one for the X and another for the Y. but honestly I woud like to understand better this 2d arrays.

Thank you guys.

koogs

positions[0][0]={{75},{75}}

this is defining an array containing two arrays each containing a single number. what you're seeing when you print it out is a reference to the array objects.

positions[0][0] = 75; positions[0][1] = 75;

or

positions[0] = {75, 75};

is, i think, what you want (untested)

koogs

or even

int[][] positions = {
  {75, 75},
  {75, 300},
  {75, 525}
};

again, untested

frankpuppa

Thanks guys! I understand what was the problem. I think I was doing right except for a couple of things: While I was testing I used this code to control the flow: println(position[0][0] + " " +i); i was increased by a for cycle. That line doesn't work for some reasons.

for (int i=0; i<positions.length; i++){
    if(!s){
    println(positions[2][1]);
    print(" ");
    println(i);
     } This for instance does work.. Something I don't understand.

int[][] positions=new int[3][3];
  positions[0][0]={{75},{75}}; //This doesn't work

int[][] positions=new int[3][3];
  positions[0][0]={75};             // This neither

int[][] positions=new int[3][3];
  positions[0][0]={75,75};        //This neither

this insted works fine!
/*int[][] positions= { {75, 75},
                     {75, 300},
                     {75, 525}
};*/

and refers accordingly to: 0-0/1
1-0/1
2-0/1
I think that the main problem was that sort of mistake in the println which drove me into the wrong way... thank you guys!

GoToLoop

Besides this at-once format:

final short[][] positions = {
  {75, 75},
  {75, 300},
  {75, 525}
};

exit();

We can assign a sub-array 1 by 1 to it: (~~)

final short[][] positions = new short[3][];

positions[0] = new short[] {75, 75};
positions[1] = new short[] {75, 300};
positions[2] = new short[] {75, 525};

exit();