Notes on Mortgage Applet

• The init method lays out the initial contents of the screen
• Three Labels associated with three TextFields
  • Correspond to input prompts in application version
  • Place for the user to enter (hopefully) numeric data
• Button (labelled "Compute") to signal that the fields have been filled in
  • Program could also respond to the event of each field being filled in
  • Complete application when numeric data in all three fields detected
• action method determines if the "Compute" button was pushed
  • Uses update method to perform actual computation
  • Screen display is automatically updated to reflect the contents of the message area (msg)
• update method performs some computations as the main method in application version
  • Checks for all fields being filled in
  • Performs the actual mortgage calculations
  • Output into scrolled window, so any number of months may be displayed