import org.apache.commons.lang.ArrayUtils; public class Main { public static void main(String[] args) { Integer[] integers = { new Integer(1), new Integer(2), new Integer(3), new Integer(5), new Integer(8), new Integer(13), new Integer(21), new Integer(34), new Integer(55) }; int[] fibbos = ArrayUtils.toPrimitive(integers); System.out.println(ArrayUtils.toString(fibbos)); } }