public String toFormatedString(Iterable<Entry<T, Integer>> set, String separator) {
StringBuilder sb = new StringBuilder();
for (Entry<T, Integer> e : set) {
toFormatedString(e.getKey(), e.getValue(), sb, separator);
}
return sb.toString();
}
public void printTopN(PrintStream out, String separator, int n) {
List<T> topKeys = getTopKeys(n);
StringBuilder sb = new StringBuilder();
for (T key : topKeys) {
toFormatedString(key, get(key), sb, separator);
}
out.print(sb.toString());
}
