import java.util.HashSet;
import java.util.Set;
public class FindDups {
public static void main(String args[]) {
Set s = new HashSet();
String[] values = new String[] { "java", "java2", "rntsoft", "javas",
"java" };
for (int i = 0; i < values.length; i++)
if (!s.add(values[i]))
System.out.println("Duplicate detected: " + values[i]);
System.out.println(s.size() + " distinct words detected: " + s);
}
}