public String choose() {
int ran = Math.abs(Analysis.random.nextInt() % nEntries);
Iterator iter = completions.keySet().iterator();
int sum = 0;
while (iter.hasNext()) {
String key = (String) iter.next();
WordEntry we = (WordEntry) completions.get(key);
if (we == null) throw new NullPointerException();
sum += we.getnEntries();
if (ran <= sum) return we.word;
}
throw new NullPointerException("Cannot get here");
}
