I am in a for loop

sounds deeply philosophical :P


You might want to give a bit more context here.  Maybe a 2D array is what you need?  Maybe you could use an ArrayList to store your new arrays.  Alternatively a custom storage Class might make your life simpler...  All depends on what you're trying to achieve.

I need to create a new Array inside for loop for each iteration...

You done stuff with ActionScript previously?  That looks very much like stuff I'd write working with MovieClips; but it's not going to work in Java: IIRC it's not possible to construct an variable name dynamically like that (but I'll be happy to be proven wrong).  A better approach is as I suggested: use a container to store your new arrays (untested):

1. ArrayList container;
2. container = new ArrayList();
3. 
   
4. for(i=0;i<thumblength;i++){
5.       // you should check up the syntax for declaring variables/arrays too - this isn't ActionScript ;)
   
6.       float[] thumbs = new float[10];
7.       container.add(thumbs);
8. }

Then you can use the index of the ArrayList to access the stored array (again untested):

1. for(i=0;i<thumblength;i++){ 
2.   float[] thumb = (float[]) container.get(i);
3.  }

Though you could just as easily use a 2D array.  The best option probably depends on what you're storing in your array.

First off: are you definitely working in Processing?  The example code you posted is almost definitely ActionScript - i.e. Flash...

The usual way - in Processing at least - to achieve what you describe is to use a container for the objects (in this case Arrays) being created inside the loop.  You could do this with a 2D array but, depending on what you want to store, an ArrayList may be more flexible:

1. int numObjects = 5;
2. int arrayLength = 10;
3. ArrayList container;
4. void setup() {
5.   container = new ArrayList();
6.  
7.   // store arrays in the Arraylist
8.   for(int i=0; i<numObjects; i++){
9.       // create a new array:
   
10.       int[] intArray = new int[arrayLength];
11.       // populate the array
12.       for(int j=0; j < arrayLength; j++) {
13.         intArray[j] = (i* arrayLength) + j;
14.       }
15.       // add the array to the ArrayList
16.       container.add(intArray);
17.   }
18.  
19.   // Retrieve arrays from the ArrayList
20.   for(int i=0; i<numObjects; i++){
21.     // retrieve the array
22.     int[] intArray = (int[]) container.get(i);
23.    
24.     String items = "index " + i + " contains array: [";
25. 
    
26.     // iterate over the retrieved array
27.     for(int j=0; j<intArray.length; j++) { 
28.       items += (intArray[j] + ", ");
29.     }
30.     println(items + "]");
31.   }
32.  
33. }

Hello, thanks again for your help.. I was thinking about this problem, and now I'm using a 2D array. Is definitely working, but I don't know if that is the best option, becouse I have to initiate the array with de maximum length possible. If I could create the array inside of the loop I would create it with the lenght that I need. But I think thats not a big problem, at least until now.

You can make variable length arrays inside a main array.

1. int[][] data = new int[10][];
2. for (int i = 0; i < data.length; i++)
3. {
4.   int len = (int) random(2, 10);
5.   data[i] = new int[len];
6.   for (int j = 0; j < data[i].length; j++)
7.   {
8.     data[i][j] = j;
9.   }
10. }
11. for (int i = 0; i < data.length; i++)
12. {
13.   println("-- " + i);
14.   println(data[i]);
15. }

Nice.. I didn't know that!!