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- Create a class named CollegeCourse that includes data fields that hold the
department (for example, ENG), the course number (for example, 101), the credits
(for example, 3), and the fee for the course (for example, $360). All of the fields
are required as arguments to the constructor, except for the fee, which is calculated
at $120 per credit hour. Include a display() method that displays the course
data. Create a subclass named LabCourse that adds $50 to the course fee. Override
the parent class display() method to indicate that the course is a lab course and
to display all the data. Write an application named UseCourse that prompts the
user for course information. If the user enters a class in any of the following
departments, create a LabCourse: BIO, CHM, CIS, or PHY. If the user enters any
other department, create a CollegeCourse that does not include the lab fee.
Then display the course data. Save the files as CollegeCourse.java, LabCourse.java,
- Write an application named UseInsurance that uses an abstract Insurance class
and Health and Life subclasses to display different types of insurance policies
and the cost per month. The Insurance class contains a String representing the
type of insurance and a double that holds the monthly price. The Insurance class
constructor requires a String argument indicating the type of insurance, but the
Life and Health class constructors require no arguments. The Insurance class
contains a get method for each field; it also contains two abstract methods named
setCost() and display(). The Life class setCost() method sets the monthly fee
to $36, and the Health class sets the monthly fee to $196. Write an application
named UseInsurance that prompts the user for the type of insurance to be displayed, and then create the appropriate object. Save the files as Life.java,
Health.java, Insurance.java, and UseInsurance.java.
- Create an abstract class called Student. The Student class includes a name and a
Boolean value representing full-time status. Include an abstract method to determine
the tuition, with full-time students paying a flat fee of $2,000 and part-time students
paying $200 per credit hour. Create two subclasses called FullTime and PartTime.
Create an application that demonstrates how to create objects of both subclasses.
Save the files as Student.java, FullTime.java, PartTime.java, and UseStudent.java.
- The mean of a list of numbers is its arithmetic average. The median of a list is its
middle value when the values are placed in order. For example, if a list contains
1, 4, 7, 8, and 10, then the mean is 6 and the median is 7. Write an application
that allows you to enter five integers and displays the values, their mean, and
their median. Save the file as MeanMedian.java.
- Revise the MeanMedian class so that the user can enter any number of
values up to 20. If the list has an even number of values, the median is the
numeric average of the values in the two middle positions. Save the file as
- You wrote a program named MeanMedian that allows a user to enter
five integers and then displays the values, their mean, and their median. Now,
modify the program to throw an exception if an entered value is not an integer.
If an exception is thrown, display an appropriate message and allow the user to
reenter the value. Save the file as MeanMedianHandleException.java.
- Write an application that displays a series of at least five student ID numbers
(that you have stored in an array) and asks the user to enter a numeric test score
for the student. Create a ScoreException class, and throw a ScoreException
for the class if the user does not enter a valid score (less than or equal to 100).
Catch the ScoreException, and then display an appropriate message. In addition,
store a 0 for the student’s score. At the end of the application, display all the
student IDs and scores. Save the files as ScoreException.java and TestScore.java.
- Create a file that contains your favorite movie quote. Use a text editor such as
Notepad, and save the file as quote.txt. Copy the file contents, and paste them into
a word-processing program such as Word. Save the file as quote.docx. Write an
application that displays the sizes of the two files as well as the ratio of their sizes to
each other. Save the file as FileStatistics2.java.
- Create a program that accepts a series of employee ID numbers, first names, and
last names from the keyboard and saves the data to a file. Save the program as
WriteEmployeeList.java. When you execute the program, be sure to enter
multiple records that have the same first name because you will search for
repeated first names in part d of this exercise.
- Write an application that reads the file created by the WriteEmployeeList
application and displays the records. Save the file as
Write an application that extends JFrame and that displays a phrase in every font
size from 6 through 20. Save the file as JFontSizes.java.
- Write an application that extends JFrame and that displays a phrase upside down
when the user clicks a button. The phrase is displayed normally when the user
clicks the button again. Save the application as JUpsideDown.java.