
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Using JAVA language complete the following tasks inside the Employee class:
Consider a base class named Employee and its derived classes HourlyEmployee and PermanentEmployee while taking into account the following criteria.
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- Employee class has three data fields i.e. a name (of type string) and specific empID (of type integer), and hourlyincome.
- Two Constructors i) No argument Constructor ii) Three argument Constructor
- A Method earnings() that returns the income of employee.
- It has a toString method, which returns a string in the following format.
- Employee: Ali (ID: 786), Income: 90000 PKR
- The derived classes (HourlyEmployee) has an attribute named totalHours.
- Both the classes (HourlyEmployee and PermanentEmployee) have a no argument constructor and a three-argument constructors to initialize the hourlyIncome as well as data fields of the base class.
- The id, name, and hourlyincome should be initialized using the constructor of the employee class (Show the appropriate use of super keyword)
- The totalHours for HourlyEmployee should be input from user right inside the constructor
- Override Method earning() in HourlyEmployee and permanenetEmployee to calculate the income of an employee for the actual number of hours he or she worked. Note, the income for Employee/PermanentEmployee objects are paid for exact 180 hours, no matter how many actual hours he or she worked.
- Implement the toString Method for both classes. The method should return the string formatted according to following for each class:
The Test Class:
- Develop the main() method inside the employee class, create an instance of Employee class in addition to both classes (i.e. HourlyEmployee and PermanentEmployee) with the data of your own choice.
- Test the working of functions that calculate the total income of an employee.
- Test the toString methods of both classes by printing both objects in a print statement.
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