Lab 07

Set up environment

• Download JDK
• Download and install IntelliJ
• Start an IntelliJ project
• Download the template java files and move them to the src folder

Folder Structure

Your intelij project directory should look something like the following:

Lab07 
|-- out
`-- src
    |-- Circle.java
    |-- Point.java
    |-- Ring.java
    |-- ShapeDrawer.java
    |-- ShapeUtilsTester.java
    `-- Tester.java

Create Files

Here are the clases you are to create:

• ShapeUtils.Java – A Java class with many static functions that perform various geometric computations on Java objects
• DrawSolar.Java – A Java program that creates an image fitting a few key requirements
• solar.png – A copy of the type of image your code can generate

You also need to make changes to Circle.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;
  }