illustrates serialization and deserialization : ObjectOutputStream « File « Java Tutorial

1. Java Tutorial
2. File
3. ObjectOutputStream

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

class shutdown {
  public static void main(String[] args) throws ClassNotFoundException, IOException {
    FileOutputStream fos = new FileOutputStream("objects.tmp");

    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject("asdf");
    oos.flush();
    fos.close();
    
    FileInputStream fis = new FileInputStream ("objects.tmp");  
    ObjectInputStream ois = new ObjectInputStream (fis);  
    String t = (String) ois.readObject ();  
    fis.close ();   
    
  }
}