import com.sun.java.util.collections.HighPerformanceCollections; public class Main { public static void main(String[] args) { IntList intList = HighPerformanceCollections.getIntList(); intList.add(1); intList.add(2); intList.add(3); for (int i = 0; i < intList.size(); i++) { System.out.println(intList.get(i)); } intList.remove(0); intList.set(0, 4); int value = intList.get(0); } }