i got

int[] gcu;

And i want to add values to that, do i have to create a counter to append the array?

gcu[counter] = append....

Code:

  void cleanUpGrid(){//alles met 6 buren de g[#] waarde oplsaan in array, vervolgens al die waarden op false zetten
    for(int i=0; i<g.length; i++){
	// println(g[i]); //
	x = i % w;
	y = (i / w) % h;
	z = i / (w * h);
	//int p = (x + y * w) + z * w * h;//
	if(checkPos(x-1, y, z) == true){
	  if(checkPos(x+1, y, z) == true){
	    if(checkPos(x, y-1, z) == true){
		if(checkPos(x, y+1, z) == true){
		  if(checkPos(x, y, z-1) == true){
		    if(checkPos(x, y, z+1) == true){
			 //println("g["+i+"]"+" kan weg");
			 gcu = append(gcu, i);
		    }
		  }
		}
	    }
	  }
	}
    }
  }
 

Append() returns an Object. That means that you have to cast the object into an array that fits.
http://processing.org/reference/append_.html
Code:

intArray = (int[])append(...); 

The line "gcu[counter] = append(...);" translates to "integer at counter = new Object" which doesn't match up.
You would only use an index if you had sub-arrays.
Code:

int[] intArray; //array of integers
int[][] intSubs; //array of arrays
...
//Note the casting to an integer array
intSubs[0] = (int[])append(...); //adds to the first sub array
intArray = (int[])append(...); //just adds to the array.
 

Hope that makes sense.

Maybe an ArrayList would be easier to follow when adding or removing items. Still have to cast to the correct type though.
http://processing.org/reference/ArrayList.html

I take back part of my post; you would only have to cast if the array is of objects (instead of primitives such as 'int').

As for adding i to the array, this assigns gcu to a new array that includes both the original data from gcu and i:

"gcu = append(gcu, i);"

Will it do what you need? Can't say without more code to test the function.

thx all, this is wat i was looking for:


int[] gcu = new int[0];//grid clean up


gcu = append(gcu, i);