Streams & Serialization

Streams

In Java java.io, a stream is a sequence of data.

• Byte Streams: Read/Write bytes (8-bit). Used for binary data (images, audio).
  • FileInputStream, FileOutputStream
• Character Streams: Read/Write characters (16-bit Unicode). Used for text.
  • FileReader, FileWriter

Serialization

Serialization is the process of converting the state of an object into a byte stream.

• The object can be saved to a file or sent over a network.
• To enable it, a class must implement the Serializable interface.

import java.io.Serializable;

class Student implements Serializable {
    int id;
    String name;
}

Deserialization

The reverse process: converting a byte stream back into an object.

Interactive Code

Check if a class is serializable.

Quiz

Next Steps

Now let's do multiple things at once with Concurrency.