comparator

:

java

Which java.util.Set realizations sorts the elements by their natural order (or on Comparator basis).?

java

What will be printed out as a result of the following code execution? import java.util.TreeSet; public class TestTreeSet { public static void main(String[] args) { TreeSet<Item> set = new TreeSet<Item>(); set.add(new Item(2)); set.add(new Item(5)); set.add(new Item(2)); System.out.println(set); } static class Item { int n; Item(int n) { this.n = n; } public String toString() { return "Item " + n; } } }