Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Asiacell I.
Exercises in classes.pdf
Exercises
1. Suppose class called Student that defines three instance variables:
name (string), age (integer) and average(double).
Write a program (in java) to read and print data to the class student.
2. Suppose class called Student that defines three instance variables:
name (string), age (integer), mark1, mark2 and mark3 (double)
And three methods:
• readinfo for read data for student.
printinfo for print student name and average.
average for return average of three marks (mark1, mark2 and mark3).
Write a program that test methods in the class.
3. Suppose class called Student that defines four instance variables:
name (string), age (integer), marks (2D for store marks (double)for 6
lesson in 4 years ), averages(1D for store averages(double) of 4 years)
And three method:
• readinfo for read data for student.
• printinfo for print student name and average for student.
Average for calculate averages of 4 years.
Write a program that test methods in the class.
4. Design a class named employee. The class contains:
Five data field named: name(string), age(int), yearsofService(int), job(string)
and salary(double).
• A method named testRetired() that return true if the employee deserved
retirement otherwise return false.
A method for read data for employee.
A method for print the message "Is Greater" if the employee have salary
greater than sal.
A method for print the message "Retired" if the employee will be retired.
Write a program that test methods in the class.
Hint: the employee deserved retirement if he has year of Service >25 or his
age >=65.
5. Design a class named Mylnteger. The class contains:
• An int data field named value(int)
• Methods isEven() and isodd() that return true if the value is even or odd
respectively.
Write a program that test methods in the class.
Dr. Raidah Salim
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Transcribed Image Text:Asiacell I. Exercises in classes.pdf Exercises 1. Suppose class called Student that defines three instance variables: name (string), age (integer) and average(double). Write a program (in java) to read and print data to the class student. 2. Suppose class called Student that defines three instance variables: name (string), age (integer), mark1, mark2 and mark3 (double) And three methods: • readinfo for read data for student. printinfo for print student name and average. average for return average of three marks (mark1, mark2 and mark3). Write a program that test methods in the class. 3. Suppose class called Student that defines four instance variables: name (string), age (integer), marks (2D for store marks (double)for 6 lesson in 4 years ), averages(1D for store averages(double) of 4 years) And three method: • readinfo for read data for student. • printinfo for print student name and average for student. Average for calculate averages of 4 years. Write a program that test methods in the class. 4. Design a class named employee. The class contains: Five data field named: name(string), age(int), yearsofService(int), job(string) and salary(double). • A method named testRetired() that return true if the employee deserved retirement otherwise return false. A method for read data for employee. A method for print the message "Is Greater" if the employee have salary greater than sal. A method for print the message "Retired" if the employee will be retired. Write a program that test methods in the class. Hint: the employee deserved retirement if he has year of Service >25 or his age >=65. 5. Design a class named Mylnteger. The class contains: • An int data field named value(int) • Methods isEven() and isodd() that return true if the value is even or odd respectively. Write a program that test methods in the class. Dr. Raidah Salim
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