What is Serialization in Java? | Java Tutorial | Edureka
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The document discusses serialization in Java. Serialization is the process of converting a Java object into a byte stream to transfer the object between Java Virtual Machines. To serialize an object, its class must implement the Serializable or Externalizable interface. There are advantages like simplicity and universal applicability, but also disadvantages like objects becoming brittle during deserialization. Best practices for serialization include using javadoc tags and avoiding serializing certain fields.
What is Serialization in Java? | Java Tutorial | Edureka
- 1. Copyright © 2017, edureka and/or its affiliates. All rights reserved.
- 2. www.edureka.co ADVANTAGES AND DISADVANTAGES HOW DO WE SERIALIZE AN OBJECT? WHY DO WE NEED SERIALIZATION? WHAT IS SERIALIZATION? CONTROVERSIES ON SERIALIZATION BEST PRACTICES
- 4. JVM-1 JVM-2 Byte Stream Object Object Byte Stream WHAT IS SERIALIZATION? www.edureka.co
- 5. www.edureka.co Serialization in Java is the process of converting the Java code Object into a Byte Stream, to transfer the Object Code from one Java Virtual machine to another and recreate it using the process of Deserialization.
- 6. WHY DO WE NEED SERIALIZATION? www.edureka.co
- 7. WHY DO WE NEED SERIALIZATION? Persistence Deep Copy Caching Cross JVM Synchronization Communication www.edureka.co
- 8. HOW DO WE SERIALIZE AN OBJECT? www.edureka.co
- 9. www.edureka.co To Serialize an object, the parent class should implement either of the following interfaces: âą java.io.Serializable âą java.io.Externalizable HOW DO WE SERIALIZE AN OBJECT?
- 11. ADVANTAGES âą Serialization process does not require third-party software. âą The Serialization procedure is simple . âą Serialization procedure is universal . âą It is easy to use and simple to customize. âą Serialized data streams support Encryption, Compression, Authentication and secure Java computing. âą Many critical technologies relying on serialization. www.edureka.co
- 12. DISADVANTAGES âą Objects while Deserialization becomes brittle. âą Serialization results in the failure in the initialization of transient variables resulting in a variation to the Standard Java Flow. âą Serialization is inefficient in terms of memory utilization. âą Serialization does not offer any transition control mechanism per every SE. âą Serialization procedure fails to offer fine-grained control to access Objects. www.edureka.co
- 14. Copyright © 2017, edureka and/or its affiliates. All rights reserved. www.edureka.co SERIALIZATION USING INHERITANCE CASE - 1 www.edureka.co
- 15. Copyright © 2017, edureka and/or its affiliates. All rights reserved. www.edureka.co SERIALIZATION USING INHERITANCE CASE - 2 www.edureka.co
- 16. Copyright © 2017, edureka and/or its affiliates. All rights reserved. www.edureka.co SERIALIZATION USING INHERITANCE CASE - 3 www.edureka.co
- 17. Copyright © 2017, edureka and/or its affiliates. All rights reserved. www.edureka.co SERIALIZATION USING A STATIC MEMBER www.edureka.co
- 19. Implementation Methods Process Public No-Arg Constructor Backward Compatibility EXTERNALIZABLE INTERFACE www.edureka.co
- 20. www.edureka.co âą While using Externalizable Interface the user explicitly mentions the objects to be serialized. âą In Serialization Interface, all the objects and variables are serialized in the run-time. IMPLEMENTATION
- 21. www.edureka.co âą Externalizable interface consists of two methods, namely: writeExternal() readExternal() âą Serializable Interface does not include any methods. METHODS
- 22. www.edureka.co âą Externalizable Interface provides customization to the Serialization process. âą Serialization Interface will provide the default serialization process. PROCESS
- 23. www.edureka.co âą Externalizable Interface supports Serialization regardless of the version control. âą Serialization Interface requires the same version of JVMs on both the ends, but it incorporates automatic serialization. BACKWARD COMPATABILITY
- 24. www.edureka.co âą Externalization Interface needs Public No-Arg Constructor to reconstruct the serialized object. âą Serialization Interface uses reflection to reconstruct the serialized object or class. PUBLIC NO-ARG CONSTRUCTOR
- 27. www.edureka.co TRANSIENT KEYWORD Transient Keyword Transient Keyword is used as a variable modifier at the time of the Serialization process. Declaring a variable with transient keyword avoids the variable from being Serialized. TRANSIENTKEYWORD
- 29. www.edureka.co SERIAL VERSION UID Serializable objects get associated with a unique identification number provided by the JVM of the host machine. This Unique ID is called Serial Version UID. SERIALVERSIONUID
- 31. www.edureka.co WHAT IS AN INHERITANCE? Oracleâs Architects intend to remove Serialization from Java as they consider it as a Horrible Mistake of 1997. After hectic research, the developers at Oracle found out a few flaws in the design of Serialization procedure which pose a threat to the data.
- 33. BEST PRACTICES âą It is recommended use javadoc@ serial tag for denoting Serializable fields. âą The .ser extension is preferred to be used for files representing serialized objects. âą It is not recommended for any static or transient fields to undergo default serialization. âą Extendable classes should not be Serialized unless it is mandatory. âą Inner Classes should be avoided to be involved in Serialization. www.edureka.co
- 35. www.edureka.co