Display course and appropriate message Program plan: Filename: “CourseException.java” Define “CourseException” class which extends from “Exception” class Define the constructor Call the super method. Filename: “Course.java” Define the “Course” class Declare the required variables and set the values Define the default constructor Set the values Define the parameterized constructor Set the values Check the length of the department Append the string to the “msg” variable Check the “num” value is less than “LOW_NUM” or greater than “HIGH_NUM” Append the string to the “msg” variable Check “msg” is not equal to empty string. Throw an exception. Define “toString” method Return the value Filename: “ThrowCourseException.java” Define the class “ThrowCourseException” Define the “main” method Create an object for “Course” class Declare the variables and set the required values to the variables Iterate “for” loop until it reaches length of the “course” Set the values to the object Iterate “for” loop until it reaches length of the “course” In “try” block, set the values In “catch” block, display the course and error Display the course values

Question

Create a CourseException class that extends Exception and whose constructor receives a String that holds a college course’s department (for example, CIS), a course number (for example, 101), and a number of credits (for example, 3). Save the file as CourseException.java. Create a Course class with the same fields and whose constructor requires values for each field. Upon construction, throw a CourseException if the department does not consist of three letters, if the course number does not consist of three digits between 100 and 499 inclusive, or if the credits are less than 0.5 or more than 6. Save the class as Course.java. Write an application that establishes an array of at least six Course objects with valid and invalid values. Display an appropriate message when a Course object is created successfully and when one is not. Save the file as ThrowCourseException.java.

Answer 1

Question

Chapter 12, Problem 6PE

Program Plan Intro

Display course and appropriate message

Program plan:

Filename: “CourseException.java”

Define “CourseException” class which extends from “Exception” class

Define the constructor

Call the super method.

Filename: “Course.java”

Define the “Course” class

Declare the required variables and set the values

Define the default constructor

Set the values

Define the parameterized constructor

Set the values

Check the length of the department

Append the string to the “msg” variable

Check the “num” value is less than “LOW_NUM” or greater than “HIGH_NUM”

Append the string to the “msg” variable

Check “msg” is not equal to empty string.

Throw an exception.

Define “toString” method

Return the value

Filename: “ThrowCourseException.java”

Define the class “ThrowCourseException”

Define the “main” method

Create an object for “Course” class

Declare the variables and set the required values to the variables

Iterate “for” loop until it reaches length of the “course”

Set the values to the object

Iterate “for” loop until it reaches length of the “course”

In “try” block, set the values

In “catch” block, display the course and error

Display the course values

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Create a CourseException class that extends Exception and whose constructor receives a String that holds a college course’s department (for example, CIS), a course number (for example, 101), and a number of credits (for example, 3). Save the file as CourseException.java. Create a Course class with the same fields and whose constructor requires values for each field. Upon construction, throw a CourseException if the department does not consist of three letters, if the course number does not consist of three digits between 100 and 499 inclusive, or if the credits are less than 0.5 or more than 6. Save the class as Course.java. Write an application that establishes an array of at least six Course objects with valid and invalid values. Display an appropriate message when a Course object is created successfully and when one is not. Save the file as ThrowCourseException.java.

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