Balloon Race Applet Lab

Follow the steps below to create a balloon race applet that partially meets the specifications on which you based your object-oriented design last week.

• Read through the BalloonApplet and Balloon classes and run the applet in the BalloonApplet.html web page to understand what the BalloonApplet class is doing.
   
• Download the RandNumGenerator class to your project as well.
   
• Modify the BalloonApplet class so that the width of a balloon is 3/4ths the height of a balloon.  The overall height of a balloon, including the balloon and its basket should be twice the height of the balloon alone.
   
• Implement the move method in the Balloon class.
   
• In the BalloonApplet class, fix the calculation of the pixel coordinates for the upper-left corner of a balloon, which should depend on the balloon's current location.  Remove the getRandomX method.
   
• In the paint method, set the color of the balloon appropriately, not to a random color.
   
• Add a finish line to the applet.  (This requires changes in two different methods.)  Label the finish line with an "F," similar to the "S" label for the starting line.  Don't put the finish line all the way at the right margin; leave enough room for a balloon to cross it and still be displayed in the applet.  (How much space do you need to leave to the right of the finish line to accomodate any single move over the line that a balloon might make?)
   
• In the step method, calculate the leading edge (right edge) of the balloon and then test whether the leading edge has crossed the finish line.  Remove all the references to keeping track of the number of simulation steps that have been run.
   
• Draw a basket beneath the balloon.  The height of the basket should 1/4th the overall height of the balloon.  (This leaves a blank space between the basket and the balloon that is also 1/4th the overall height.)  If you want to, add two lines from the edges of the balloon down to the basket, to connect the basket to the balloon.
   
• Modify the program to handle an array of balloons.  Put three or four balloons in the array.  The animation should stop when the leading edge of any one of the balloons crosses the finish line.
   
• If you have time, you may experiment with increasing the size of the applet, painting a background, or improving the appearance of the applet in any other way you choose.