What is the different the logic in here

Question

Hi method one work fine but method two no
what mistake in method two
two
Date sdate = null;
    Date edate = null;
    Date oldDay =null;
   temp = request.getParameter("sdate");
   String temp1=request.getParameter("edate");
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date());
    cal.set(Calendar.DAY_OF_MONTH, 1);
/** if((temp==null)&&(temp1==null))
      sdate = cal.getTime();
      cal.add(Calendar.MONTH, 1);
      cal.add(Calendar.DATE, -1);
      edate = cal.getTime();
      if(temp != null){
      sdate = StringFormater.transformDate(temp);
      //if first date is selected and biger than the laast day
       edate = cal.getTime();
      if(sdate.after(edate)){
      cal.setTime(sdate);
      cal.add(Calendar.MONTH, 1);
      cal.add(Calendar.DATE ,-1);
      edate = cal.getTime();
      //session.setAttribute("oldDate", edate);
     else {
        session.setAttribute("oldDate", edate);
        edate=(Date)session.getAttribute("oldDate");
     }  */one
if (temp != null) {
        sdate = StringFormater.transformDate(temp);
    else {
        sdate = cal.getTime();
    temp = request.getParameter("edate");
    if (temp != null) {
        edate = StringFormater.transformDate(temp);
    } else {
        cal.add(Calendar.MONTH, 1);
        cal.add(Calendar.DATE, -1);
        edate = cal.getTime();
  if(sdate.after(edate)){
    cal.setTime(sdate);
    cal.add(Calendar.MONTH, 1);
    cal.add(Calendar.DATE ,-1);
    edate = cal.getTime();
  }thank you

Answer 1

for the following code
i can't let the else work , we have two calendar on jsp , we want
the defaul is the 12 /1(sdate) to 12/31(edate)
i f i change the sdate to 1/1/2007 then the end should be automatically to 1/31/2007
and if the first one is 1/2/2007, then 1/28/2007, but if the first one change to 1/1/2007 the end one should keep 1/28/2007 not change,
the secode one do the job, and yes the logic is more better , but I want to know what mistake I made in the way one??
if(temp != null){
      sdate = StringFormater.transformDate(temp);
      //if first date is selected and biger than the laast day
       edate = cal.getTime();
      if(sdate.after(edate)){
      cal.setTime(sdate);
      cal.add(Calendar.MONTH, 1);
      cal.add(Calendar.DATE ,-1);
      edate = cal.getTime();
      //session.setAttribute("oldDate", edate);
     else {
        session.setAttribute("oldDate", edate);
        edate=(Date)session.getAttribute("oldDate");
     } Thank you