import org.apache.commons.collections.primitives.ArrayIntList; import org.apache.commons.collections.primitives.IntList; public class PrimitiveExample { public static void main(String[] args) { IntList intList = new ArrayIntList(); intList.add(1); intList.add(2); intList.add(3); for (int i = 0; i < intList.size(); i++) { int value = intList.get(i); System.out.println(value); } } }