Final answer:
In Java, you can create a base class called Employee that includes private or protected data fields for firstname, lastname, and employee ID. This class needs to include get methods for retrieving the data and a constructor to set the data fields at the time of instantiation.
Step-by-step explanation:
In Java, you can create a base class called Employee by defining a class with the keyword 'class' followed by the class name 'Employee'. Inside this class, you can declare private or protected data fields for the firstname, lastname, and employee ID using the 'private' or 'protected' access modifiers.
To create the necessary get methods, you can define public getter methods for each data field. For example, a getter method for the firstname field would look like this:
public String getFirstName() {
return firstname;
}
To set all the data fields at the time of instantiation, you can create a constructor that takes parameters for each field and initializes them accordingly. Here's an example of a constructor for the Employee class:
public Employee(String firstName, String lastName, int employeeId) {
this.firstname = firstName;
this.lastname = lastName;
this.employeeId = employeeId;
}