Treemaps - getting stuff out!

Question

Hi there
I have created a data structure as follows:
TreeMap bookingMap = new TreeMap();
String [] timesAsString = {"09:00","09:45","10:30","11:15","12:00","12:45","13:30","14:15","15:00","15:45","16:30","17:15"};
//String [] daysAsString = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
//String [] courtNumbers = {"1","2","3","4","5"};
  public void initialiseData() {
  for (int i = 1;i<6;i++) {
    TreeMap courtMap = new TreeMap();
    bookingMap.put (new Integer(i),courtMap);
    for (int j = 1; j<8;j++) {
      TreeMap dayMap = new TreeMap();
      courtMap.put(new Integer (j),dayMap);
      //dayMap.put(daysAsString[j],courtMap);
      for (int k = 0; k<12;k++) {
        dayMap.put(new String(timesAsString[k]),"FREE");
        //TreeMap timeMap = new TreeMap();
        //timeMap.put(timesAsString[k],dayMap);
      }//end loop k
    }//end loop j
  }//end loop i
  }//end initialiseDataAnd am then trying to retrieve a value from them as follows:
//check to see if TIME SLOT IS FREE - first, lets display it!!
          tempBookingMap = (TreeMap)bookingMap.get(new Integer(courtNumber));
          tempCourtMap = (TreeMap)tempBookingMap.get(new Integer(dayAsInt));
          bookingData =  (String)tempCourtMap.get(new String(timeToString));
          output2 = bookingData;
          JOptionPane.showMessageDialog(null,output,"Test Validation",JOptionPane.INFORMATION_MESSAGE);
          JOptionPane.showMessageDialog(null,output2,"AVAILABILITY",JOptionPane.INFORMATION_MESSAGE);There are no cast exceptions, syntax errors in this code BUT I get no values returned - ideally, I want to see the word 'free' appear on my screen.
Can anyone point me in the right direction here?
Help much appreciated.
Thanks.

Answer 1

First, work out which line has the problem. After the last variable assignment, System.out.println the variable. If that gives the wrong value, work back, printing the previous variable assignment. When you get the right value, you know the problem is further on. By narrowing it down to one line, you should be able to see what the problem must be.