@Override public String lastString(){
  return Integer.toString(lastint);
}

@ Override public String lastString ( ) { return Integer . toString ( lastint ) ; }
return the previous string generated by the distribution ; e . g . , returned from the last nextstring ( ) call . calling laststring ( ) should not advance the distribution or have any side effects . if nextstring ( ) has not yet been called , laststring ( ) should return something reasonable .
