Programming Assignment #6
This assignment focuses on reading input file and on using array structures. You will need
DrawingPanel.java, which you used on previous assignments, and balls.java to write this
program. Be sure to include a short comment at the beginning of your program as well as a short comment
for each method describing what it does. For this assignment you are limited to the language features in
Chapters 1-7 shown in lecture or the textbook.
1. (10 points) Write a Java program that outputs a list of students from the given data file. Download the
data file (student.txt) from our web site to the same folder as your program. You have to input the name of
the data file from keyboard. You have to use input.hasNext()or input.hasNextInt() or
input.hasNextDouble()with while loop when your program reads tokens from the file. We are
assuming that you don’t know how many lines in the data file. The file contains student name followed by
gender and age. You also have to input (from keyboard) f or female if you want to print a list of female
students, and m or male if you want print a list of male students. Your program outputs the student’s
name and total number of students of the gender and their average age. For example if your data file
contains the following data:
1 John m 18
2 William m 22
3 Susan f 21
4 Jack m 19
5 Jennifer f 18
Your program should produce the following output:
What is the file name? student.dat
Which gender do you want? female
Susan
Jennifer
We have 2 female students.
Average age is 19.5.
2. (30points). Rewrite your balls.java program which is assignment 5 so that your program includes
array structure. You have to include five arrays to store x coordinate, y coordinate, speed, direction and
color for each ball. If you haven’t finished the assignment 5 yet, download ballsSample.java and use it.
