CCSU  Spring, 2000

Project 3

Posting Date: May 5, 2000
Due Date:     May 18, 2000

Corrections Posted:  May 11, 2000
  Corrections to part a:  insert the word static in public double area(double r)
  so it reads public static double area(double r)

Do the following:

a.  Write a Java screen based application which calculates and displays the area
of three circles, one of radius 1, one of radius 1.5, and one of radius 2.  Your
program should display appropriate text for each circle, for instance

    radius = 1   area = ...

USE A METHOD to calculate the area.  Your method should be appropriately 
parametrized.  Your method header will look something like this:  public double 
area(double r)  Since you are going to calculate the area of three different 
circles, you will declare your method only once but call it three times.

Use Math.PI for the value of PI.

b.  Turn your sum of integers program from project 2 (program 2b) into a Java 
Applet.  Your Applet Panel should have a label to display the title, a second 
label to prompt the user for the value of N, a text field where the user will 
enter the value of N, and a button labeled "Go" to initiate the computation.  
Also, USE A METHOD to compute the sum of integers.  See the QuickDemos Applet 
SumSquaresApplet.java for inspiration.

c.  Write a Java Applet which will simulate tossing a pair of dice 1000 times, 
and will record the number of occurrences of each outcome in a Frequency Array 
indexed from 0 to 12.  As there are no outcomes of 0 or 1 (the smallest score 
you can roll is two dots (snake eyes) or 2), you will only use boxes 2 through 
12 of the frequency array to store the distribution of outcomes.

You can easily modify the coin tossing demo, Demo 16.  Of course you are, by 
now, experts at simulating tossing six sided dice, so use what you know from 
project 2 and the QuickDemos page.  In particular, ignore the way Demo 16 uses 
the (clumsy) Java Random class, and use the much simpler Math.random() instead.

For each of the above, hand in the printed copies of the text of all three 
classes, as well as a 3.5" floppy disk with the .java and .class files for your 
classes, as described in project 1.

GOOD NEWS:  NO FLOWCHARTS, NO PSEUDO CODE REQUIRED!!!

Notes:

(1) Your files MUST be named CircleArea.java, SumIntApplet.java and 
DiceRollApplet.java, so I can easily find them.

(2) You must hand in your files on a CLEAN disk.  No files from other projects, 
no files from programs done in class, just the files for THIS PROJECT.

(3) Each of your programs must begin with a remark box, as described in 
project 1.

(4) You must use a folder with POCKETS, as described in project 1.

Due Thursday, May 18, 2000 AT THE BEGINNING OF THE EXAM.