private static final long serialVersionUID = 1022481205507844610L;

The line of code you provided is declaring a static final long variable called serialVersionUID and assigning it a value of 1022481205507844610L.

The serialVersionUID is a unique identifier for a Serializable class. It is used during the deserialization process to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the serialVersionUID values don't match, then a InvalidClassException is thrown during deserialization