Deexternalization in java

package com.usr.io;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

public class DeExternalizationDemo {

       public static void main(String[] args) {

              Employee emp = new Employee();

              File file = new File("employee.ser");

              FileInputStream fis = null;

              ObjectInputStream ois = null;

              try {

                     fis = new FileInputStream(file);

                     ois = new ObjectInputStream(fis);

                     emp.readExternal(ois);

              } catch (IOException ex) {

                     ex.printStackTrace();

              } catch (ClassNotFoundException ex) {

                     ex.printStackTrace();

              } finally {

                     try {

                           if (ois != null) {

                                  ois.close();

                           }

                     } catch (IOException ex) {

                           ex.printStackTrace();

                     }

                     try {

                           if (fis != null) {

                                  fis.close();

                           }

                     } catch (IOException ex) {

                           ex.printStackTrace();

                     }

              }

              System.out.println("Object DeExternalized........");

              System.out.println(emp.name);

              System.out.println(emp.age);

              System.out.println(emp.salary);

       }

}

output 

Object DeExternalized........
name:Alex
age:26
salary:34567.8