一个简单的问题，求助

Question

int uage=(Integer)request.getParameter("userage");

Answer 1

int uage=Integer.parseInt(request.getParameter("userage"));

Answer 2

int uage=Integer.parseInt(request.getParameter("userage"));

Answer 3

int uage=Integer.parseInt(request.getParameter("userage"));
支持

Answer 4

看这样行不行？int uage=(int)request.getParameter("userage");

Answer 5

String  strTmp = "";
int uage;

if(request.getParameter("userage") == null)
{
  usage=0;
}
else
{
  strTmp = request.getParameter("userage");
  if(strTmp.equals(""))
  {
    usage=0;
  }
  else
  {
    uage = Integer.parseInt(request.getParameter("userage") );
  }
}