抽象类无法实例化成对象

2017-10-10 10:42:00
admin
原创
295
/* 文件名 : AbstractDemo.java */
public class AbstractDemo
{
   public static void main(String [] args)
   {
      /* 以下是不允许的,会引发错误 */
      Employee e = new Employee("George W.", "Houston, TX", 43);

      System.out.println("\n Call mailCheck using Employee reference--");
      e.mailCheck();
    }
}

/* 文件名 : Employee.java */
abstract class Employee
{
   private String name;
   private String address;
   private int number;
   public Employee(String name, String address, int number)
   {
      System.out.println("Constructing an Employee");
      this.name = name;
      this.address = address;
      this.number = number;
   }
   public double computePay()
   {
     System.out.println("Inside Employee computePay");
     return 0.0;
   }
   public void mailCheck()
   {
      System.out.println("Mailing a check to " + this.name
       + " " + this.address);
   }
   public String toString()
   {
      return name + " " + address + " " + number;
   }
   public String getName()
   {
      return name;
   }
   public String getAddress()
   {
      return address;
   }
   public void setAddress(String newAddress)
   {
      address = newAddress;
   }
   public int getNumber()
   {
     return number;
   }
}
文章分类
联系我们
电话: 18902328227
Email: 2689701946@qq.com
QQ: 2689701946
微信: 18902328227
地址: 广州番禺区繁华路
  • 在线客服
  • 关注微信
  • 联系电话
    • 欢迎咨询
    • 欢迎加入QQ群 303257430
  • 公众号:源宝网络
    • 联系电话及微信号 18902328227