public String asString(boolean lead, char sep) {
StringBuffer result = new StringBuffer();
String seps = (lead ? " " : "") + sep + " ";
String[] myTags = asArray();
for (int i = 0; i < myTags.length; i++) {
if (i != 0) result.append(seps);
result.append(myTags[i]);
}
return result.toString();
}
public static String asTag(String n) {
StringBuffer result = new StringBuffer(n.length());
for (int i = 0; i < n.length(); i++) {
char c = n.charAt(i);
if (Character.isLetter(c)) {
result.append(Character.toLowerCase(c));
} else if (Character.isDigit(c)) {
result.append(c);
}
}
return result.toString();
}