// This is a collection we'll iterate over below.
Set<String> wordset = new HashSet<String>();
// We start with a basic loop over the elements of an array.
// The body of the loop is executed once for each element of args[].
// Each time through one element is assigned to the variable word.
for(String word : args) {
System.out.print(word + " ");
wordset.add(word);
}
System.out.println();
// Now iterate through the elements of the Set.
for(String word : wordset) System.out.print(word + " ");
