128 lines
2.6 KiB
Java
128 lines
2.6 KiB
Java
/**
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@version 1.11 2004-05-11
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@author Cay Horstmann
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*/
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import java.io.*;
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import java.util.*;
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class ObjectFileTest
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{
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public static void main(String[] args)
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{
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Manager boss = new Manager("Carl Cracker", 80000, 1987, 12, 15);
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boss.setBonus(5000);
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Employee[] staff = new Employee[3];
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staff[0] = boss;
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staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
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staff[2] = new Employee("Tony Tester", 40000, 1990, 3, 15);
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try
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{
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// save all employee records to the file employee.dat
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ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("employee.dat"));
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out.writeObject(staff);
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out.close();
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// retrieve all records into a new array
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ObjectInputStream in = new ObjectInputStream(new FileInputStream("employee.dat"));
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Employee[] newStaff = (Employee[]) in.readObject();
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in.close();
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// print the newly read employee records
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for (Employee e : newStaff)
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System.out.println(e);
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}
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catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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}
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class Employee implements Serializable
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{
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public Employee() {}
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public Employee(String n, double s, int year, int month, int day)
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{
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name = n;
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salary = s;
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GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day);
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hireDay = calendar.getTime();
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}
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public String getName()
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{
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return name;
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}
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public double getSalary()
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{
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return salary;
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}
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public Date getHireDay()
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{
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return hireDay;
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}
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public void raiseSalary(double byPercent)
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{
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double raise = salary * byPercent / 100;
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salary += raise;
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}
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public String toString()
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{
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return getClass().getName()
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+ "[name=" + name
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+ ",salary=" + salary
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+ ",hireDay=" + hireDay
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+ "]";
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}
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private String name;
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private double salary;
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private Date hireDay;
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}
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class Manager extends Employee
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{
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/**
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@param n the employee's name
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@param s the salary
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@param year the hire year
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@param month the hire month
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@param day the hire day
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*/
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public Manager(String n, double s, int year, int month, int day)
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{
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super(n, s, year, month, day);
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bonus = 0;
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}
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public double getSalary()
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{
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double baseSalary = super.getSalary();
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return baseSalary + bonus;
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}
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public void setBonus(double b)
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{
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bonus = b;
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}
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public String toString()
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{
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return super.toString()
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+ "[bonus=" + bonus
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+ "]";
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}
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private double bonus;
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}
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