##Seralization
- The process of writing state of ab object to a file is caleed seralization
- using ObjectOutStream(FileOutPutStream f) class we can achieve serialization
FileOutputStream fos = new FileOutputStream("abc.txt", true);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(object)FileInPutStream fos = new FileInPutStream("abc.txt", true);
ObjectInputStream oos = new ObjectInputStream(fos);
oos.readObject()