Week 4:
Instructions:
The Test Plan for each project includes the Pseudocode, Flowchart, Goals and Objectives, Functional Requirements, and Test Matrix including Actual Output column. Below the table are screenshots verifying the actual output for each case.
Week 4 Notes – Mathematical Functions; Characters and Strings
Recalling our Week 3 Notes: We are using conditions – if/else and switch statements, and we use the diamond in flowcharting to show a condition, a question to be answered true or false or with multiple answers. Section 3.5 of our textbook helps us with the flowcharting.
For Week 3, we have graded items due this week:
- Week 3 Discussion, (2) Week 3 Quizzes and Projects 3 & 5 from text, (3) Test Plan
WEEK 4 TASKS
We are working with (1) Mathematical Functions, and with (2) Characters & Strings.
We have our graded tasks as usual:
(1) Week 4 Discussion, (2) Week 4 Quizzes and Projects 1 & 5, (3) Test Plan
Mathematical Functions from the standard Math Library, which we can find here, for example – Java Math Library. We see the Math class, with methods/functions such as sqrt, pow, and round about 1/3 way down the page. Almost anything you’d like to do with Math functions has already been written for you as a method/function in the Library. (In your next Java course, you’ll see much more use of Library classes as a tremendous time saver. No need to reinvent the wheel. List of Standard Java Classes
Characters and Strings are also found in the standard Java Library – Character class, with methods such as equals, toUpperCase and toLowerCase (about ½ way down the page), and String class, with methods such as equals, equalsIgnoreCase, and contains (about ½ way down again, since methods/functions are below other information).
Then you have graded Projects 1 and 5, in which you will use what you have learned.
Flowcharts – Our Test Plan flowcharts will be much easier in Week 4, without conditions. In Week 5 we’ll work with Loops and will need conditions once again, with the diamond symbol.
For Project 1:
You will find this short, with input, calculation and output. Look for the Math functions such as Math.sin (for the sine) and Math.PI for the constant PI.
For Project 5:
We have another short program recognizing valid and invalid Social Security numbers. Note that the Character class in Java has a method called isdigit().
NOTE: The Java Library contains more than 4400 classes such as the Math, Character and String classes. These can provide functions/methods to do many tasks for you, just by using the method, such as: answer = Math.sqrt(4444);
