//PersonTest.java
import java.text.*;

public class PersonTest
{  
   public static void main(String[] args)
   {  
      Person[] people = new Person[2];
      people[0]= new Employee("張三", 50000);// 給員工與學生對象數組賦值
      people[1]= new Student("李四", "計算機科學");
      for (int i = 0; i < people.length; i++)// 打印輸出關于人類的基本信息
      {  
         Person p = people[i];
         System.out.println(p.getName() + ", " + p.getDescription());
      }
   }
}

abstract class Person//抽象人類                       
{  
   public Person(String n)
   {  
      name = n;
   }

   public abstract String getDescription();//抽象方法    

   public String getName()
   {  
      return name;
   }

   private String name;
}

class Employee extends Person//子類1：員工                  
{  
   public Employee(String n, double s)
   {  
                                          
      super(n);// 傳遞信息到父類構造函數
      salary = s;
   }

   public double getSalary()
   {  
      return salary;
   }

   public String getDescription()//子類1的方法：員工工資               
   {  
      NumberFormat formatter
         = NumberFormat.getCurrencyInstance();
      return "員工的工資是："+ formatter.format(salary);
   }

   public void raiseSalary(double byPercent)
   {  
      double raise = salary * byPercent/100;
      salary += raise;
   }
   private double salary;
}

class Student extends Person//子類2 ：學生               
{  
     public Student(String n, String m)
   {  
      super(n);// 傳遞字符n到父類構造函數
      major = m;
   }

   public String getDescription()//子類2 的方法 ，得到學生的專業        

   {  
      return "學生的專業是：" + major;
   }

   private String major;
}