Question

Java program. Code the following interfaces, implement them, and use the interface as a parameter, respectively: a. An interface called Printable with a void print() method. b. An interface called EmployeeType with FACULTY and CLASSIFIED integer data. The value of FACULTY is 1 and CLASSIFIED is 2. a. A class called Employee to implement the two interfaces. Its constructor will initialize three instance data as name, employeeType, and salary. Implementation of method print() will display name, employeeType, and salary; salary is to be displayed as a currency format. You may use an if-else construct to identify the nature of the 281 employeeType—FACULTY or CLASSIFIED—so the particular information of each category can be shown. b. Write a static method called printInfo() with a void return type in a class called Output. The first parameter is a Printable type, and it will accept the object of Employee as an argument. The second parameter is an integer type representing the quantity of printings. The method will display all employee information with the specified number of printings. c. Write a driver code to test the above code. Create at least three objects with instance data of your choice. Call printInfo() to display the information of each object, respectively. You may decide how many times to print the information.

Answer 1

The Java Code is as follows:

import java.util.*;
import java.text.*;
interface Printable // Printable Interface
{
    void print();
}

interface EmployeeType //EmpoyeeType Interface
{
    int FACULTY=1;
    int CLASSIFIED=2;
}

class Employee implements Printable,EmployeeType //Employee class implements the two interfaces
{
    String name;
    int employeeType;
    double salary;
   //Constructor
    public Employee(String n,int type,double s)
    {
        this.name = n;
        this.employeeType = type;
        this.salary = s;
    }
   //print method definition
    public void print()
    {
        System.out.println("Name = " +name);
        if(employeeType == FACULTY)
            System.out.println("Employee Type = Faculty");
        else
            System.out.println("Employee Type = Classified");
        System.out.print("Salary = ");
        Locale locale = new Locale("en", "US");    
        //Formatting Salry in Currency Format
        System.out.println(NumberFormat.getCurrencyInstance(new Locale("en", "US")).format(salary));
    }
}

class Output
{
    //printInfo Method in Ouptut class to print Employee Details
    public static void printinfo(Printable p, int num)
    {
        Employee e=(Employee) p;
        for(int i=0;i<num;i++)
            e.print();
    }

}
public class Program
{
   public static void main(String[] args) {
        Employee e1 = new Employee("Harry",1,200.2);
        Employee e2 = new Employee("Potter",2,120.00);
        Employee e3 = new Employee("James",1,160.89);
        Output.printinfo(e1,3);
        Output.printinfo(e2,2);
        Output.printinfo(e3,1);
   }
}

OUTPUT: