Creating a Sorted Set

A sorted set is a set that maintains its items in a sorted order. Inserts and retrievals are more expensive in a sorted set but iterations over the set is always in order.

// Create the sorted set

SortedSet set = new TreeSet(); 

// Add elements to the set
set.add("b");
set.add("c");
set.add("a");

// Iterating over the elements in the set
Iterator it = set.iterator();
while (it.hasNext()) {
// Get element
    Object element = it.next();
} // The elements are iterated in order: a, b, c

// Create an array containing the elements in a set (in this case a String array).
// The elements in the array are in order.  
String[] array = (String[])set.toArray(new String[set.size()]);