Joe Chung
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====== Review of Java Basics, IDEs, Intro to Two-Dimensional Arrays ======

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===== Review of Java Basics (with an intro to IDEs) =====

  * Integrated Development Environments
    * Recommended link: http://www.leepoint.net/notes-java/tools/10ide.html
    * Advantages over using simple text editors plus command line:
      * (Usually) Single environment for the program development cycle: editing, compiling, running/debugging programs
      * Visual error reporting
    * Many to choose from
      * Simple IDEs
        * Used in education, beginning programming
        * Today, we will use [[http://bluej.org|BlueJ]].
      * Advanced IDEs
        * Used by "real" developers
        * Support large projects
        * Collaboration features
        * Support for multiple programming languages
        * Support for GUI building
        * Later, we'll try [[http://www.netbeans.org|NetBeans]] and maybe [[http://www.eclipse.org|Eclipse]].

==== Lab Activity: Run bluej and try editing, compiling and running Java programs ====

   * Login to Linux in HH 310.
   * Start a Terminal in Linux.
   * Create the "cs176" or "cs501b" folder, which will hold all your work for this course.
   * Start //bluej// in the Terminal.
   * Write a save a simple program.

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===== Introduction to Two-Dimensional Arrays =====

  * Recommended link: http://www.fredosaurus.com/notes-java/data/arrays/arrays-2D.html

  * Lab Activity: Try writing a simple program that uses a 2-D array to store and print the following [[array of stars]] (asterisks):

<code>
           *****
           *   *
           *****
</code>

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===== Example Application of Two-Dimensional Arrays: Minesweeper =====

  * If you don't know what minesweeper is, see [[https://en.wikipedia.org/wiki/Minesweeper_(video_game)|Wikipedia]].
    * You can also play a version of the game online at http://www.chezpoor.com/minesweeper/minesweeper.html.
  * What follows are some screens from a simple text-mode version of minesweeper.


<code>
                          :)
  
                1  2  3  4  5  6  7  8  9
               -- -- -- -- -- -- -- -- --
           1 |  -  -  -  -  -  -  -  -  -
           2 |  -  -  -  -  -  -  -  -  -
           3 |  -  -  -  -  -  -  -  -  -
           4 |  -  -  -  -  -  -  -  -  -
           5 |  -  -  -  -  -  -  -  -  -
           6 |  -  -  -  -  -  -  -  -  -
           7 |  -  -  -  -  -  -  -  -  -
           8 |  -  -  -  -  -  -  -  -  -
           9 |  -  -  -  -  -  -  -  -  -
  
         Enter a command to perform, where command is one of:
  
              'o' to open a square
              'f' to mark a square with a flag (F)
              '?' to mark a square with a question mark (?)
              'c' to clear a square
              'q' to quit the game
  
         Enter a command ( <o,f,?,c,q> ): o
  
         Enter row & column coordinates of square separated by a space: 2 2
  
                          :)
  
                1  2  3  4  5  6  7  8  9
               -- -- -- -- -- -- -- -- --
           1 |  -  -  -  -  -  -  -  -  -
           2 |  -  4  -  -  -  -  -  -  -
           3 |  -  -  -  -  -  -  -  -  -
           4 |  -  -  -  -  -  -  -  -  -
           5 |  -  -  -  -  -  -  -  -  -
           6 |  -  -  -  -  -  -  -  -  -
           7 |  -  -  -  -  -  -  -  -  -
           8 |  -  -  -  -  -  -  -  -  -
           9 |  -  -  -  -  -  -  -  -  -
</code>



  * Basic functionality:
    * Creation of program grid
    * Setting of randomly placed mines, computation of numbers in unmined squares
    * Drawing of user interface
    * Opening and displaying of grid squares specified by player
    * Setting of flags and question marks on grid squares specified by player

  * Advanced functionality:
    * Checking if the last move has won or lost the game
    * Clearing all surrounding unmined squares when an unmined square is opened

  * How might this be programmed?
    * Assuming this will involve two-dimensional arrays, how would the array (or arrays) be used?

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