//If we do not add "implements Cloneable", then runtime exception: java.lang.CloneNotSupportedException
public class Employee implements Comparable<Employee>, Cloneable {
    private String name;
    private double salary;
    private Day hireDay;

    public Employee(String n, double s, int year, int month, int day) {
        name = n;
        salary = s;
        hireDay = new Day(year, month, day);
    }

    void setName(String n) {
        name = n;
    }

    void setSalary(double s) {
        salary = s;
    }

    void setHireDay(Day d) {
        hireDay = d;
    }

    Day getHireDay() {
        return hireDay;
    }

    @Override
    public String toString() {
        return "name=" + name + ",salary=" + salary + ",hireDay=" + hireDay;
    }

    @Override
    public int compareTo(Employee another) {
        if (this.salary == another.salary)
            return 0;
        else if (this.salary > another.salary)
            return 1;
        else
            return -1;
    }

    @Override
    public Employee clone() throws CloneNotSupportedException {
        Employee copy = (Employee) super.clone(); // actually by the superclass Object
        copy.hireDay = new Day(this.hireDay.getYear(), this.hireDay.getMonth(), this.hireDay.getDay()); // Or call
                                                                                                        // .clone of
                                                                                                        // this.hireDay
        copy.name = new String(this.name); // Can be omitted, since strings are immutable
        return copy;
    }
}