Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(
"moby-tag-list.txt"), "utf-8"));
AnnotationIndex tokenIndex = cas.getAnnotationIndex(TokenAnnotation.type);
FSIterator tokIt = tokenIndex.iterator();
TokenAnnotation token = null;
for (tokIt.moveToFirst(); tokIt.isValid(); tokIt.moveToNext()) {
token = (TokenAnnotation) tokIt.get();
writer.write(token.getPosTag());
writer.write('\n');
}
writer.close();