public final class Boss extends Employee
  {
  private double salary;
  public Boss(String name, double salary)
    { super(name); setSalary(salary); }
  public void setSalary(double s)
    { salary = (s > 0.0) ? s : 0.0; }
  public double earning()
    { return salary; }
  public String toString()
    { return "ρ餾: " + getName(); }
  }