<dependency> <groupId>commons-primitives</groupId> <artifactId>commons-primitives</artifactId> <version>1.2</version> </dependency> import org.apache.commons.collections.primitives.ArrayIntList; import org.apache.commons.collections.primitives.IntList; public class Example { public static void main(String[] args) { intList.add(1); intList.add(2); intList.add(3); } }