How to restrict user to enter only two digits for Integer Field in gxt/gwt -

i want restricted user not enter more 2 digits inetger field in gxt

setting maxlength attribute of dom input text element possible, use things comes gxt:

numberfield<integer> nf = new numberfield<integer>(new integerpropertyeditor()); nf.addvalidator(new maxnumbervalidator<integer>(99)); 

any number greater 99 marked error.