Employee.java

public class Employee {
    int employeeId;
    String firstName;
    String middleName;
    String lastName;
    int experience;
    int salary;

    public void calculateSalary() {
        if (experience < 5) {
            salary = 2000;
        }
        if (experience > 5 && experience < 10) {
            salary = 5000;
        }
        if (experience < 15) {
            salary = 10000;
        }
    }

    String getDesignation() {
        if (experience < 2) {
            return "D2";
        }
        if (experience < 5 && experience > 2) {
            return "D3";
        }
        if (experience > 10) {
            return "M1";
        }
        return "CEO";
    }

    Employee(String firstName, String middleName, String lastName) {
        this.firstName = firstName;
        this.middleName = middleName;
        this.lastName = lastName;
    }

    public void setEmployeeId(int x) {
        this.employeeId = x;
    }

    public void printEmployeeDetails() {
        System.out.println("This method will print employee details");
    }

    public Double employeeMagicMethod() {
        return Math.random();
    }

    public static void main(String[] args) {
        Employee employee = new Employee("Mohandas", "Karamchand", "Gandhi");
        employee.setEmployeeId(1);
    }
}