LinkedHashMap中具有JTextFields的JLabels

Question

I have a program that at one part demands a user to determine the amount of days per week in 40 weeks (def = 5).

The user firstly fills in the amount of days the 40 weeks will have, to then set the days per week.

Now, I have both JLabel (KEY) and JTextfield (VALUE) stored in a LinkedHashMap ,

  LinkedHashMap<JLabel, JTextField> weeksMap = new LinkedHashMap<JLabel,JTextField>();
  for (int i=1; i<=40; i++)  {
      JLabel weekL = new JLabel("Week "+i);
      JTextField weekF = new JTextField(10);
      weekF.setText("5");
            //SetWeekAction sWA = new SetWeekAction(mainPane, weekL, weekF);
            //weekF.addActionListener(sWA);
      weeksMap.put((weekL), weekF);
  }

and they will be added to the panel after user sets the total amount of days in the certain year.

EDIT - NOTE: the reason for having these two in a HashMap is I cannot create elements on lick, otherwise I could create infinite labels and text fields and I do not wish to work with buttonpressed=true or such. I need both text fields and labels 'prepared' before the 'click' happens.

 for (Map.Entry<JLabel, JTextField> entry : weeksMap.entrySet()) {
        index++;
        weeksPane.add(entry.getKey()); 
        weeksPane.add(entry.getValue());
 }

The GUI view

How do I get the text field of for example 'Week 23'? The for loop goes through the List and adds the Objects correctly, but I have no reference to that certain object anymore.

Answer 1

You can use one ArrayList for storing text field and label text

ArrayList<JTextField> weeks = new ArrayList<JTextField>();

for (int i=1; i<=40; i++)  {
    JTextField weekF = new JTextField(10);
    weekF.setName("Week "+i);
    weekF.setText("5");
    JLabel weekL = new JLabel(weekF.getName());
    weekL.setLabelFor(weekF);
    weeks.put(weekF);
}

On update event you can invalidate and redraw weeks panel

Answer 2

I can think of one simple solution of making two separate LinkedHashMap one as LinkedHashMap < integer, JLabel> and another as LinkedHashMap

Now in your loop you can add value in both the LinkedHashMap using the int value from loop as key for JLabel and JTextField while storing them in your both LinkedHashMap. Since both JLabel and JTextField are now attached with the integer value according to the loop number in which they were created you can access them using those integer value.

Hope this can solve your problem.