Purposes of this assignment:

• To give you some experience writing applets
• To give you some experience in implementing GUIs
• To give you more experience in solo programming

General idea of the assignment:

This assignment is to write an Applet that lets users play your Lunar Lander game. As before, the game progresses in a series of turns (that is, it is not animated). You can use as much or as little of your previous code as you like. In fact, if you prefer, you can take my example code (two files: LunarLander.java and LunarLanderGame.java) and use those as a starting point.

Details:

This is a solo assignment, to make sure that everyone gets some experience doing GUI programming. After this, we will (probably) return to pair programming.

You should provide a GUI with at least the following things in it:

• Your name, at the top of the Applet
• A reasonably large rectangular Panel (or Canvas) in which to display the "lander."
  • Use drawing commands in your public void paint(Graphics g) method to draw the lander, first near the top of the window, then lower in the window as the lander descends. A background would also be nice, but not required.
• Controls at the bottom of the applet:
  • A "slider" (Scrollbar), to choose how much fuel to burn
  • A TextField that displays the number chosen in the scrollbar.
    • There should be a fixed maximum amount that you can burn at a time.
    • Note: This field should always be consistent with the scrollbar. That means it should either be disabled (so that the user cannot type into it), or you should change the slider to match what the user types (which can be very tricky).
  • A "Burn" Button, to burn the fuel (and proceed to the next "turn").
    • Each time you burn fuel, you should call repaint() to update the drawing of your lander.
  • A "Play Again" Button. This should be disabled (grayed out) when a game is in progress.
  • TextFields, with Labels, showing your current altitude, velocity, and fuel remaining.
    • These TextFields should be disabled, to prevent user entry.
  • Some way (I'll leave this one up to you) to display the final result (i.e., success or crash).

You will find that creating a reasonable-looking GUI is perhaps the most challenging part of the assignment. Remember: Use additional Panels to help arrange space. BorderLayout is your friend, but you may also want to use GridLayout or FlowLayout for some of your Panels. Remember also that the AWT doesn't give you a lot of control, so you will probably have to settle for a GUI that looks "good enough" rather than really classy.

Due date:

Your program is due before midnight, Thursday, November 6. Zip up all files (.java, .class, and any extra files produced by BlueJ, such as .pkg and .pkh files), and submit via Blackboard. Note that this time you also need to include the .html file; this can be the one produced by BlueJ, or one that you have created.

Special note:

If you did not do well on the Traffic Jam assignment, here is a chance to at least partially make up for it. In addition to writing the above assignment as an Applet, also write it as an application. You can use the same GUI as in your Applet, but you should also have a way to quit the program--either with a "Quit" button, or by clicking the window's close box, or (preferably) both.

Here are the special grading considerations for this make-up assignment:

• The application version will not be graded unless you have done the Applet version (so do the Applet first!).
• The maximum score for the program will be the smaller of (1) 50 points and (2) the number of points you lost on TrafficJam. (Example: If you got 70 points on TrafficJam, you could earn an additional 30 points; but if you got nothing on TrafficJam, you could earn an additional 50 points.)
• Due date: Midnight, Sunday, November 9. Late programs will lose 5 points/day.