import java.io.*;

class A{
    public static void main(String args[]) {
        SaveFile file = new SaveFile();
        file.str = "직렬화";
  
        try{
            ObjectOutputStream oos =
                new ObjectOutputStream(new FileOutputStream("SaveFile"));
            oos.writeObject(file);
            oos.flush();
   
            ObjectInputStream ois =
                new ObjectInputStream(new FileInputStream("SaveFile"));
            SaveFile file2 = (SaveFile) ois.readObject();
   
            ois.close();
            oos.close();
   
            file2.print();
   
        }catch(Exception e){}
    }
}

class SaveFile implements Serializable{
    String str;
 
    public void print(){
        System.out.println(str);
    }
}