A Class that can resize an Array (see oldArray in Code) to larger Arrays

GroundPatternResizer.java

    public static void main(String[] args) {
        int[] oldArray = new int[]{5, 6,
                                   8, 4};
        int[] newArray = new int[(int) Math.pow(2, 16)];
        int halfNewLength = newArray.length / 2;
        int rootNewLength = (int) Math.sqrt(newArray.length);
        int rootHalfNewLength = rootNewLength / 2;
        System.out.printf("%1$2d %2$2d %3$2d %4$2d\n",newArray.length,halfNewLength,rootNewLength,rootHalfNewLength);
        for (int i = 0; i < halfNewLength; i+=rootNewLength) {
            for (int j = 0; j < halfNewLength; j++) {
                if (j<rootHalfNewLength) {
                    newArray[j+i] = oldArray[0];
                    newArray[j+i + halfNewLength] = oldArray[2];
                    newArray[j+i+rootHalfNewLength] = oldArray[1];
                    newArray[j+i + halfNewLength +rootHalfNewLength] = oldArray[3];
                }
            }
        }
        StringBuilder sb = new StringBuilder("{\n");
        for (int i = 0; i < newArray.length; i++) {
            sb.append(newArray[i]).append(",");
            if ((i + 1) % rootNewLength == 0) {
                sb.append("\n");
            }
        }
        sb.append("}");
        System.out.println(sb.toString());
    }