Java Serializable implement with custom serialization method

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;

class Main {/*www. ja v a  2 s  . c  o m*/

  public static void main(String[] args) {
    Language object1 = new Language(1, "HTML");
    Language object2 = new Language(2, "CSS");
    try {
      OutputStream fout = new FileOutputStream("ser.txt");
      ObjectOutput oout = new ObjectOutputStream(fout);
      oout.writeObject(object1);
      oout.writeObject(object2);
      fout.close();
      oout.close();

      InputStream inputStream = new FileInputStream("ser.txt");
      ObjectInput objectInput = new ObjectInputStream(inputStream);

      System.out.println((Language) objectInput.readObject());
      System.out.println((Language) objectInput.readObject());

      objectInput.close();
      inputStream.close();
    } catch (Exception ioe) {
      ioe.printStackTrace();
    }
  }

}

class Language implements Serializable {
  private static final long serialVersionUID = 1L;
  private Integer id;
  private String name;

  public Language(Integer id, String name) {
    this.id = id;
    this.name = name;
  }

  @Override
  public String toString() {
    return "Language [id=" + id + ", name=" + name + "]";
  }

  private void writeObject(ObjectOutputStream oos) {
    try {
      System.out.println("Internally Write Method Called");
      oos.writeInt(this.id);
      oos.writeObject(this.name);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  private void readObject(ObjectInputStream ois) {
    try {
      System.out.println("Internally Read Method Called");
      id = ois.readInt();
      name = (String) ois.readObject();
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}