Java import it.unimi.dsi.fastutil.ints.IntArrayList; public class HighPerformanceCollectionExample { public static void main(String[] args) { IntArrayList intList = new IntArrayList(); intList.add(10); intList.add(20); intList.add(30); for (int i = 0; i < intList.size(); i++) { System.out.println(intList.getInt(i)); } } }