CS241: Spring 2017 -- Lecture 1

1. (20) Introduction, administrivia and overview
   • First day quiz! ...and roll call
   • 40/10/40?
   • Expertise survey results
   • Intro page
2. My goals (In any enterprise, this is always the first question to ask/answer.)
   • For you to become familiar with standard computing data structures and algorithms
   • For you to gain expertise building GUIs
   • Overall, for you to come away with confidence in your ability to solve most any computing problem you come across.

3. /* prescription for beginning a GUI NetBeans project...
    *
    * a. create a project Application (save where you will be able to find it!)
    * b. add new WhateverFrame() as the only thing in main
    * c. create a Swing Frame with the same name (i.e. WhateverFrame)
    *      set its layout to null
    *      in the constructor: setVisible(true); and setSize(456, 567); -- otherwise they retain their default values of 0 (i.e. false, and (0,0))
    *      add the Components you want
    *      for each Component
    *          set the name to something meaningful
    *          set the label/text/whatever to what you want
    *          add event handlers as needed
    * */
               

4. (20) Example let the user repeatedly input a number, n; store 1-n in an array; display the array to a TextArea (one per line) -- handle bad input gracefully
   • Creating a Frame that will be the center of your program
   • Setting the Layout to null
   • Adding/renaming a TextArea and a TextField
   • Adding actionPerformed for the TextField
   • Inputting a number from a TextField
   • try-catch the Integer.parseInt(...) line
   • Selecting and getting the focus for a TextField (inTF.selectAll(); inTF.requestFocus();)
5. (20) Java and the process of programming
   • Make all your code simple; that way it is easy to debug!
   • Develop good coding habits; if you always do things the same way, you do it automatically (and don't have to pay attention)
   • Quick Java review
   • Every class you write from scratch should have
     1. Accessors - to access the instance variables
     2. public String toString() - for debugging
     3. An initializing constructor - for ease of use
     4. The classMaker app simplifies this!
   • Test classes *before* you use them in some larger context
   • How to test a class? (write public static void main(String [] foo) in it and use Run File).
6. Lab 1
7. Arranging lab partners for this lab...