employee.java

java实例讲解, 编码分析. 多个案例集合做后一定让您有所长进

// Fig. 10.12: Employee.java
// Employee abstract superclass.

public abstract class Employee {
   private String firstName;
   private String lastName;
   private String socialSecurityNumber;

   // constructor
   public Employee( String first, String last, String ssn )
   {
      firstName = first;
      lastName = last;
      socialSecurityNumber = ssn;
   } 

   // set first name
   public void setFirstName( String first )
   {
      firstName = first;
   } 

   // return first name
   public String getFirstName()
   {
      return firstName;
   } 

   // set last name
   public void setLastName( String last )
   {
      lastName = last;
   } 

   // return last name
   public String getLastName()
   {
      return lastName;
   } 

   // set social security number
   public void setSocialSecurityNumber( String number )
   {
      socialSecurityNumber = number;  // should validate
   } 

   // return social security number
   public String getSocialSecurityNumber()
   {
      return socialSecurityNumber;
   } 

   // return String representation of Employee object
   public String toString()
   {
      return getFirstName() + " " + getLastName() +
         "\nsocial security number: " + getSocialSecurityNumber();
   } 

   // abstract method overridden by subclasses
   public abstract double earnings();
   
} // end abstract class Employee

/**************************************************************************
 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and               *
 * Prentice Hall. All Rights Reserved.                                    *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/