Java tutorial
import java.util.HashMap; import java.util.Map; public class Main { public static void main(String[] args) throws Exception { String bubba = "this is a test this is a test"; Map<Integer, Integer> occurrences = new HashMap<Integer, Integer>(); for (String currentWord : bubba.split(" ")) { Integer current = occurrences.get(currentWord.length()); if (current == null) { current = 0; } occurrences.put(currentWord.length(), current + 1); } for (Integer currentKey : occurrences.keySet()) { System.out.println("There are " + occurrences.get(currentKey) + " " + currentKey + " letter words"); } } }