Conversion of an arraylist to a 2D array of integers

[yanipao]

Conversion of an arraylist to a two dimensional array which contains integers

[Fubarable]

Conversion of an arraylist to a two dimensional array which contains integers

Wishing you much luck with that.

Note that if you have an actual question, I strongly suggest that you do that, ask a question (I don't see one above), and also provide enough information so that it's answerable (right now as far as details, you don't give much). So again, about all I can do is wish you luck. :)

[[RaIdEn]]

Conversion of an arraylist to a two dimensional array which contains integers

its pretty broad and a vague question..

try giving some examples and narrowing the question. Displaying the code is even better.

[JavaJuJitZu]

int size = arrlist.size();
secondSize = size /2;
int secondSize = size%2 == 0 ? secondSize : secondSize+1;
int[][] intArray = new int[2][secondSize];
for(int i=0;i<size;i++){
if(i > secondSize){
intArray[1][i%secondSize] = arrlist.get(i);
} else{
intArray[0][i]=arrlist.get(i);
}
}

Enjoy, ofcouse the simplest case is to say new int[1][size] but thats a bit cheecky no?

[JavaJuJitZu]

On a second look that i > secondSize may need to be >=

[JavaJuJitZu]

may need a intValue() call as well

[[RaIdEn]]

int size = arrlist.size();
secondSize = size /2;
int secondSize = size%2 == 0 ? secondSize : secondSize+1;
int[][] intArray = new int[2][secondSize];
for(int i=0;i<size;i++){
if(i > secondSize){
intArray[1][i%secondSize] = arrlist.get(i);
} else{
intArray[0][i]=arrlist.get(i);
}
}

Will this code compile?. i mean excluding the class tags.

[JavaJuJitZu]

 /* declare a list and fill it */
        ArrayList<Integer> arrlist = new ArrayList<Integer>();
        arrlist.add(3);
        arrlist.add(4);
        arrlist.add(5);
        arrlist.add(10);
        arrlist.add(2);
        arrlist.add(23);
        arrlist.add(1);

        /* Original Code with a few fixes */
        int size = arrlist.size();
        int secondSize = size / 2;
        secondSize = size % 2 == 0 ? secondSize : secondSize + 1;
        int[][] intArray = new int[2][secondSize];
        for (int i = 0; i < size; i++) {
            if (i >= secondSize) {
                intArray[1][i % secondSize] = arrlist.get(i);
            } else {
                intArray[0][i] = arrlist.get(i);
            }
        }
        /* foreach loop on the multidimensional array */
        for(int[] i : intArray){
            for(int j : i){
                System.out.println("A Number in the array " + j);
            }
        }

Just stick that in a main and see for yourself, had to fix the 2nd and third line of the original, the int is on the wrong line.