DryRun Java Program – Lesson Instructions

Purpose of the Assignment

In this activity, you will practice a fundamental programming skill: reading data from a file using Java. You will learn how to:

• Locate and access a file from your project folder
• Use the Scanner class to read information from that file
• Use a for loop to repeat actions
• Process text and print formatted output

These skills are essential for many larger programming tasks you will complete later in the course.

Part 1 — Spec Sheet

Program Name: DryRun.java
Language: Java
Input File: dryrun.dat

Problem Summary

In this program, you will help the emperor create new names for Sith lords. You are given a list of words, and for each one, you must print the word with the title "Darth" in front of it.

Example:
Input word → Vader
Output → Darth Vader

Input Specification

The input file dryrun.dat will contain:

• The first line: a positive integer n → This tells you how many words will follow.
• The next n lines: one single word per line (no spaces).

Words may include underscores or hyphens (for example: Jar_Jar, K-Rish).

Example Input (dryrun.dat):

5
Vader
Maul
Tyranus
Jar_Jar
K-Rish
  

Processing / Algorithm Summary

Your program should:

• Open the file dryrun.dat.
• Read the integer n from the first line.
• Repeat n times:
  • Read a word from the file.
  • Create a new string: "Darth " + word.
  • Print the new string on its own line.
• Close the file.

Output Specification

For each input word, output a line in this exact format:

Darth <word>

There should be exactly one space between Darth and the word.

Example Output:

Darth Vader
Darth Maul
Darth Tyranus
Darth Jar_Jar
Darth K-Rish
  

Assumptions

• n is a positive number.
• The input file contains at least n words.
• Words do not contain spaces.
• The input file dryrun.dat is in the same folder as DryRun.java when you compile and run the program.
• You are using the Eclipse IDE you set up at the beginning of the year.

If you need help, ask Mr. Cusack.

Part 2 — Pseudocode

BEGIN
    OPEN the file "dryrun.dat" for input
    READ integer n from the file  // number of words

    REPEAT n times:
        READ word from the file
        SET sithName = "Darth " + word
        OUTPUT sithName to the screen

    CLOSE the input file
END
  

What You Must Submit

Upload the following four files to your Google Drive (in your class folder) and to Google Classroom:

• Java Source Code
  File name: PX_lastname_dryrunCyWoods.java
• Text Copy of Your Java Code
  File name: PX_lastname_dryrunCyWoods.txt
• Screenshot of both your code and the console output in Eclipse
  File name: PX_lastname_dryrunCyWoods.png
• Short Screen Recording showing you running the program
  File name: PX_lastname_dryrunCyWoods.mp4

Make sure the final output is clearly visible in both the screenshot and the video.

If you get stuck, confused, or see errors—don’t sit quietly. Ask Mr. Cusack for help.