Java Program on Serialization with Inheritance

Program 1

package dataflair;

public class Department extends Employee
{
      private int salary;
      private String deptname;

    public Department() {
    }

    public Department(int eid, String ename, int mobile,int salary,String deptname) 
    {
        super(eid,ename,mobile);
        this.salary=salary;
        this.deptname=deptname;
    }

    public String toString()
    {
        return "Emp Id=" +eid + " "+"Emp Name=" +ename + " " +"Mobile=" + mobile + " " + "Salary=" +salary + " " +"Department=" + deptname;
    }
      
}

Program 2

package dataflair;

import java.io.Serializable;

public class Employee implements Serializable
{
    int eid;
    String ename;
    int mobile;

    public Employee() 
    {
    }
    
    public Employee(int eid, String ename, int mobile) {
        this.eid = eid;
        this.ename = ename;
        this.mobile = mobile;
    }
}

Program 3

package dataflair;
import java.io.*;
public class TestEmpRead 
{
    public static void main(String[] args) throws IOException,ClassNotFoundException 
    {
        File F=new File("d://dataflair/empdept.txt");
        if(F.isFile())
        {
            FileInputStream fis=null;
            ObjectInputStream ois=null;
           try
           {     
            fis=new FileInputStream(F);
            ois=new ObjectInputStream(fis);
            Department D1;
            D1=(Department)(ois.readObject());
            System.out.println(D1);
           }
           finally
           {
               fis.close();
               ois.close();
               
           }    
        }
        else
            System.out.println("File not found.........");    
    }
    
}

program 4

package dataflair;
import java.io.*;
public class TestEmpwrite 
{
    public static void main(String[] args) throws IOException
    {
       File F=new File("d://dataflair/empdept.txt");
       FileOutputStream fos=null;
       ObjectOutputStream oos=null;
       try
       {
           fos=new FileOutputStream(F);
           oos=new ObjectOutputStream(fos);
           Department D=new Department(101, "Ashish Verma",112233, 56000, "IT");
           oos.writeObject(D);
           System.out.println("Record Save............");
       }
       finally
       {
           fos.close();
           oos.close();
       }    
    }
}