How to Serialize Deserialize List of Objects in Java? Java Serialization Example

Java provides a mechanism, called object serialization where an object can be represented as a sequence of bytes that includes the object’s data as well as information about the object’s type and the types of data stored in the object.

After a serialized object has been written into a file, it can be read from the file and deserialized that is, the type information and bytes that represent the object and its data can be used to recreate the object in memory.

Most impressive is that the entire process is JVM independent, meaning an object can be serialized on one platform and deserialized on an entirely different platform.

Another must read:

Classes ObjectInputStream and ObjectOutputStream are high-level streams that contain the methods for serializing and deserializing an object.

Here is a complete example. These are the steps:

  1. Create Class Item() which implements Serializable.
  2. In Main – Create 2 Item Objects.
  3. Add it to ArrayList.
  4. Serialize the ArrayList. Checkout file to see bytestream of an Object. (Below image)
  5. Deserialize the bytestream from the same file to see Object.

Serialize-File-Content

 

Output:

 

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