Java Database Connectivity (JDBC)

while(gcStart.after(gcEnd) == false)//dates inclusive
{
  combo.addItem(sdf.format(gcStart.getTime()));
  gcStart.[add a day];
}

//here is an example how to get the date
//I think this might help you!!!

import java.text.DateFormat;
import java.util.Date;

public class DateFormatExample1 {

    public static void main(String[] args) {
        // Make a new Date object. It will be initialized to the current time.
        Date now = new Date();

        // See what toString() returns
        System.out.println(" 1. " + now.toString());

        // Next, try the default DateFormat
        System.out.println(" 2. " + DateFormat.getInstance().format(now));

        // And the default time and date-time DateFormats
        System.out.println(" 3. " + DateFormat.getTimeInstance().format(now));
        System.out.println(" 4. " + 
            DateFormat.getDateTimeInstance().format(now));

        // Next, try the short, medium and long variants of the 
        // default time format 
        System.out.println(" 5. " + 
            DateFormat.getTimeInstance(DateFormat.SHORT).format(now));
        System.out.println(" 6. " + 
            DateFormat.getTimeInstance(DateFormat.MEDIUM).format(now));
        System.out.println(" 7. " + 
            DateFormat.getTimeInstance(DateFormat.LONG).format(now));

        // For the default date-time format, the length of both the
        // date and time elements can be specified. Here are some examples:
        System.out.println(" 8. " + DateFormat.getDateTimeInstance(
            DateFormat.SHORT, DateFormat.SHORT).format(now));
        System.out.println(" 9. " + DateFormat.getDateTimeInstance(
            DateFormat.MEDIUM, DateFormat.SHORT).format(now));
        System.out.println("10. " + DateFormat.getDateTimeInstance(
            DateFormat.LONG, DateFormat.LONG).format(now));
    }
}

import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.text.*;
import static java.util.Calendar.*;

public class DateComboBox extends JComboBox{
  static final Locale loc = Locale.US;

  SimpleDateFormat dateFmt;
  GregorianCalendar startDay;
  int daysSpan;
  Vector<GregorianCalendar> dvec;
  Vector<String> svec;

  public DateComboBox(GregorianCalendar start, int span, String fmtString){
    GregorianCalendar curDate;

    startDay = start;
    daysSpan = span; // days; not month, year, hour etc.
    dateFmt = new SimpleDateFormat(fmtString, loc);
    curDate = startDay;

    svec = new Vector<String>();
    dvec = new Vector<GregorianCalendar>();

    for (int i = 0; i < span; ++i){
      dvec.add(curDate);
      svec.add(dateFmt.format(curDate.getTime()));
      curDate.add(DAY_OF_MONTH, 1);
    }

    setModel(new DefaultComboBoxModel(svec));
  }

  public Vector<GregorianCalendar> getDateVector(){
    return dvec;
  }

  public GregorianCalendar[] getDateArray(){
    return (GregorianCalendar[])(dvec.toArray());
  }

  public static void main(String[] args){
    DateComboBox dcb = new DateComboBox(
        new GregorianCalendar(2007, 0, 1),
        61,
        "MMM-dd-yyyy");

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.getContentPane().add(dcb, BorderLayout.NORTH);
    frame.setSize(300, 300);
    frame.setVisible(true);
  }
}