Lab 09

CSCI 1913 – Introduction to Algorithms, Data Structures, and Program Development

Set up environment

Start an IntelliJ project
Download the files for this project and move the .java to the src folder
The image files must be placed correctly. These should go in the root folder of the project (NOT in src) – if these are misplaced you will have trouble getting tests to run

Folder Structure

Your intelij project directory should look something like the following:

.
lab09
|-- expectedImages
|   |-- buininks_inside_G.png
|   `-- ...
|-- out
|-- outputImages
|-- sourceImages
|   |-- buininks.png
|   `-- ...
`-- src
    |-- AddBorder.java
    |-- Brighten.java
    |-- ColorPallet.java
    `-- ...

Javadoc

Key Rules:

Starts with /** and ends with */
First sentence is a short summary — it appears in the generated HTML overview
@param tag should be listed for every parameter

Javadoc

   /**                                                                               
   * Calculates the average of an array of test scores.
   * Returns 0 if the array is null or empty.    
   *              
   * @param scores  an array of test scores, each in the range [0, 100]
   * @param count   the number of scores in the array
   * @return        the average of all scores, or 0 if the array is null or empty
   * @throws        IllegalArgumentException if count is negative
   *
   * @author        Adriana Picoral
   * @version       1.0
   */
  public double calculateAverage(double[] scores, int count) {
      if (scores == null || scores.length == 0) return 0;
      if (count < 0) throw new IllegalArgumentException("Count cannot be negative");

      double sum = 0;
      for (double score : scores) {
          sum += score;
      }
      return sum / count;
  }