How do I get rid of a NullPointerException (error)?

Question

Hello,
I believe that this chuck of code (leftAction) is the culprit for my error message - I know an object is required but what?
public void NumberedList()
  entries.setText(" There are " + count + "in the list");
    public void leftAction() // saves entries and displays entry count
       storage[count]= input.getText();
       NumberedList();
      win.repaint();

Answer 1

I should include the whole thing sorry - I thought that just the snipet I gave was enough
ublic class ListOfStrings extends A3ButtonHandler
        private A3ButtonWindow win;   
        private ATextField input;   
        private ALabel entries;   
        private ALabel answer;   
        private ALabel[] display;  // Declares a variable that can hold an array
        private String[] storage;
        private int count = 0;
     * Constructs the handler object, the 3-button
     * window and populates the window.
    public ListOfStrings()
        // Create the 3-button window
        win = new A3ButtonWindow(this);
        win.setLeftText("Save");
        win.setMidText("Display");
        win.setRightText("Discard");
        display = new ALabel[10];
       display[0] = new ALabel(200, 100, 200, 20); // Populate first element
        display[1] = new ALabel(200, 125, 200, 20);
        display[2] = new ALabel(200, 150, 200, 20);
        display[3] = new ALabel(200, 175, 200, 20);
        display[4] = new ALabel(200, 200, 200, 20);
        display[5] = new ALabel(200, 225, 200, 20);
        display[6] = new ALabel(200, 250, 200, 20);
        display[7] = new ALabel(200, 275, 200, 20);
        display[8] = new ALabel(200, 300, 200, 20);
        display[9] = new ALabel(200, 325, 200, 20);
        display[9] = new ALabel(200, 350, 200, 20); // Populate tenth element
        storage = new String[9];
      input = new ATextField(125,400,150,25);
      input.place(win);
      input.setFontSize(12);
   private void Status(int m)
        entries.setText("There are " + m + " entries in the list");
   private void Error()
        entries.setText("message");
        return;
public void NumberedList()
  entries.setText(" There are " + count + "in the list");
    public void leftAction() // saves entries and displays entry count
       storage[count]= input.getText();
       NumberedList();
      win.repaint();
     * Displays saved entries
    public void midAction()
  for (int i = 0; i < storage.length; i++)
    display.setText(storage[i]);
public void rightAction()
Rob