private String _10_to_62(long number) {
Long rest = number;
Stack stack =new Stack();
StringBuilder result =new StringBuilder(0);
while (rest !=0) {
stack.add(SHORT_URL_CHARS[new Long((rest - (rest /62) *62)).intValue()]);
rest = rest /62;
}
for (; !stack.isEmpty(); ) {
result.append(stack.pop());
}
return result.toString();
}
