employee.java

著名的uncle Bob的Agile software development的代码

import java.util.Date;

public interface Employee
{
  public boolean isTimeToPay(Date payDate);

  public void pay();

  public static final Employee NULL = new Employee()
  {
    public boolean isTimeToPay(Date payDate)
    {
      return false;
    }

    public void pay()
    {
    }
  };
}