Object-Oriented Programming Java Lab

Objectives

1. Understand and create a new class in Java.
2. Creating objects and accessing them in a class.
3. Creating and invoking methods in Java
4. Create constructors.
5. Create instances using argument and no-argument constructors.
6. Create static variables and methods.
7. Invoking static methods.

Tasks

1. Create a package com.trainingmug.ecommerce under /src/main/java

2. Create a new Java class named Employee in the com.trainingmug.ecommerce package with the following properties:

   • id : long
   • name : String
   • designation : String
   • grossSalary : float
   • travellingAllowances : float
   • federalTax : float
   • stateTax : float

3. Create a no-argument constructor for Employee class to initialize the instance variables to the following.

   • id: 111
   • name : Andrew Filler
   • designation = Senior Software Engineer;
   • grossSalary = 5208.33;
   • federalTax = 611.86;
   • stateTax = 359.24;

4. Create an all-argument constructor for Employee class to initialize the instance variables.

5. Create a method in Employee class to display all the property values as follows:

   public void displayProfile() {}

6. Create a method in Employee class to increase the grossSalary by the given percentage as follows:

   public void incrementSalary(float percentage) {}

7. Add the following static constant variables in Employee class:

   • companyName : String
   • companyContactNo : String
   • employeeCount : long

8. Each time the Employee object is created, the employeeCount should be incremented by 1.

9. Create a static method in Employee class to display all the static properties and the method signature as follows:

   public static void displayCompanyInfo() {}