Java Programming Language

Question

java Programming

1. Design a class named Employee_Salary that contains:

• A String data field named name representing the name of the employee.

• A String data field named position representing the position of the employee

• A double data field named salary representing the salary of the employee.

• A constructor with the parameters that initialize the name, position, and salary.

• A method named printInfo () to print the employees details (name, position, and

salary)

• Write a test program that creates an array of object to hold 5 employees object from

employee class. Assign values to the object. Calculate the salary average, then find

how many employees have a salary less than the average and how many employees

have a salary greater than the average. Calling printInfo method to display the

information of all employees and show the number of employees have a salary less

than the average and the number of employees have a salary greater than the average.

Answer 1

public class EmployeeSalary {

private final String name;

private final String position;

private final double salary;

public EmployeeSalary(String name, String position, double salary) {

this.name = name;

this.position = position;

this.salary = salary;

}

@Override

public String toString() {

return "EmployeeSalary{" +

"name='" + name + '\'' +

", position='" + position + '\'' +

", salary=" + salary +

'}';

}

public void printInfo() { // not needed but required by spec

System.out.println(this);

}

public static void main(String[] args) {

final EmployeeSalary[] employees = new EmployeeSalary[] {

new EmployeeSalary("John", "Guitar", 200_000.50),

new EmployeeSalary("Paul", "Bass", 250_000),

new EmployeeSalary("George", "Guitar", 150_000.25),

new EmployeeSalary("Ringo", "Drums", 150_000),

new EmployeeSalary("Pete", "Loser", 50_001.75)

};

final double averageSalary = Arrays.stream(employees).mapToDouble(e->e.salary).average().getAsDouble();

int numLess = 0;

int numGreater = 0;

for (final EmployeeSalary e : employees) {

if (e.salary > averageSalary) {

System.out.println("Greater Than Average: "+e);

numGreater++;

}

else if (e.salary < averageSalary){

System.out.println("Less Than Average: "+e);

numLess++;

}

else {

System.out.println("Exactly Average: "+e);

}

}

System.out.println("Average: "+averageSalary);

System.out.println("Number Greater Than Average: "+numGreater);

System.out.println("Number Less Than Average: "+numLess);

}

}

Answer 2

public class Employee_Salary{

//instance data

private String name;

private String position;

private double salary;

//constructer

public Employee_Salary(String name, String position, double salary ){

this.name = name;

this.position = position;

this.salary = salary;

}

//mutator methods

public String getName(){

return this.name;

}

public String getPosition(){

return this.position;

}

public double getSalary(){

return this.salary;

}

//accessor methods

public void setName(String name){

this.name = name;

}

public void setPosition(String position){

this.position = position;

}

public void setSalary(double salary){

this.salary = salary;

}

//miscelianous

public void printInfo(){

System.out.println("(Name: "+name+", Position: "+position+", and Salary: $"+salary+")");

}

public static double calculateAverage(Object[] objs){

double total = 0.0;

for (Object o: objs){

total += ((Employee_Salary)(o)).getSalary();

}

return total/((double)(objs.length));

}

public static void main(String[] args){

//instaniate data into array of objects

Object[] objs = new Object[5];

objs[0] = new Employee_Salary("John Doe", "Head Honcho", 1200000.0);

objs[1] = new Employee_Salary("John Smith", "Electric Boogaloo", 70001.0);

objs[2] = new Employee_Salary("Peter Porker", "Grand Ham", 100000.00);

objs[3] = new Employee_Salary("Big Chungus", "Unbeatble Entity", 10.0);

objs[4] = new Employee_Salary("Nemo", "Being Found", 0.0);

//calculate salary average

double salaryAverage = calculateAverage(objs);

System.out.println("Average Salary: $" + salaryAverage +"\n");

//less then average salaries

int count = 0;

System.out.println("Below Average Salaries:");

for (int i = 0; i < objs.length; i++){

if( ((Employee_Salary)(objs[i])).getSalary() < salaryAverage ){

((Employee_Salary)(objs[i])).printInfo();

count++;

}

}

System.out.println("Amount of below Average Salaries: " + count);

count = 0;

//greater then average salaries

System.out.println("\nAbove Average Salaries:");

int j = 0;

while (j < objs.length){

if( ((Employee_Salary)(objs[j])).getSalary() >= salaryAverage ){

((Employee_Salary)(objs[j])).printInfo();

count++;

}

j++;

}

System.out.println("Amount of Above Average Salaries: " + count);

}

}