Please help me on this problem

Question

public class DBAdapter {
     private Calendar calendar;
     public DBAdapter(
               Context context,
               String harborCode,
               Calendar calendar)
                        this.calendar = calendar;
     public Calendar     getCalendar()     { return this.calendar; }
     public int     getDate()     { return this.calendar.get(Calendar.DATE); }
     private void replaceMonthOnline() throws IOException {
           * WHY DOES IT CHANGE THIS.CALENDAR ?!?
          Calendar tmpCalendar = getCalendar();
          int monthMax = tmpCalendar.getActualMaximum(Calendar.DATE);
          int monthMin = tmpCalendar.getActualMinimum(Calendar.DATE);
          tmpCalendar.set(Calendar.DATE, monthMin); // <---- THE PROBLEM IS EVIDENT FROM HERE ON.
(...)And this changes the date also in this.calendar.
I want tmpCalendar to be changed without changing the class Calendar, too. How do I do this?
I believe this has something to do with the pass-by-reference design. But how do I achieve what I want in this case, another Calendar with the same values, and that changing one won't change the other?
Thank you.
Edited by: 801999 on Oct 12, 2010 8:29 PM
Edited by: 801999 on Oct 12, 2010 8:29 PM

Answer 1

Thanks everyone.
DrClap, that's exactly what I needed. I was trying something a little different, but was getting errors from the compiler (static references). Your solution worked perfectly. :-)
Pinto, thanks for the correction. That's what I mean. I'm here at almost 2 AM, sitting in front of the computer! :-)
RAM, yeah, I could try getting a new instance and modifying it later. But DrClap's is definitely the perfect, clean and finished solution. Also, I wasn't aware of all the innerworks of the Calendar class yet. So seeing how I could get the time of one and put it into another helped me even more.