import java.util.HashSet;
import java.util.Set;
public class FindDupsAndUnique {
public static void main(String args[]) {
Set uniques = new HashSet();
Set dups = new HashSet();
String[] values = new String[] { "java", "java2", "rntsoft", "javas",
"java" };
for (int i = 0; i < values.length; i++)
if (!uniques.add(values[i]))
dups.add(values[i]);
uniques.removeAll(dups); // Destructive set-difference
System.out.println("Unique words: " + uniques);
System.out.println("Duplicate words: " + dups);
}
}