GradeQuiz File Input Example

Quiz Questions

1. What is your login name?
2. What is Deb's email address
3. What is the sum of 4 + 47.3?

Text-only File Format that our program will read

1. login_name
2. email_address
3. value

File System - directory structure for our student quiz files

handin/
handin/deppeler.quiz1
handin/hasti.quiz1
handin/skrentny.quiz1

To create folders or text-only data files in Eclipse

1. Open Eclipse
2. Select (highlight) the project that will need to read the file
3. Select File from the menu bar.
4. Select New from the File menu.

4.a) Create a Folder

1. Select Folder
2. Type a name for the folder. (ie.  handin )
3. Press Enter keyto save the newly created folder.

4.b) Create a text-only file

1. Select Untitled text file to create a text-only file.
2. Type the contents of the file (student's answers) in the file editor window.  Follow the file format above if you want to read the file with the example code.
3. Select File -> Save As
4. Select the folder (ie. the handin folder you just created)
5. Type the name of the file.
6. Press Enter to save the newly created file.

class GradeQuiz (PSEUDOCODE)

• main method
  • create roster_list of student logins
  • for each student:
    • create filename based on path, login, file extension
    • open file (create a Scanner connected to the student's file)
    • read file and save file contents
    • close file
    • grade file contents
    • display score
• readAllLines(Scanner connected to a file) method
  • while still more lines in the scanner
    • read and save line with other lines
  • return array of lines that were read
• grade(contents of a file - array of Strings)
  • if first answer matches the login name, score plus one
  • if second answer matches deb's email, score plus one
  • convert last answer to double
  • if difference between last answer as double is close enough to sum, score plus one
  • return score

data files used in class

• handin/deppeler.quiz1
• handin/hasti.quiz1
• handin/skrentny.quiz1

coded Examples:

• GradeQuiz_001.java - class GradeQuiz_001.java (program created in Lecture 001 using ArrayList)
• GradeQuiz_002.java - class GradeQuiz_002.java (program created in Lecture 002 using String and split("\n") method

© 2014 Debra Deppeler, All rights reserved.