Wednesday, August 3, 2011

What is transient keyword in Java?

What is Serilization?

If you want to understand what is transient, then first learn what is serilization concept in Java if you are not familiar with that. Serilization is the process of making the object's state persistent. That means the state of the object is converted into stream of bytes and stored in a file. In the same way we can use the de-serilization concept to bring back the object's state from bytes. This is one of the important concept in Java programming because thisserilization is mostly used in the networking programming. The object's which are needs to be transmitted through network has to be converted as bytes, for that purpose ever class or interface must implements Serilizationinterface. It is a marker interface without any methods.

What is Transient?

By default all the variables in the object is converted into the persistent. In some cases, you may want to avoid persisting some variables because you don't have the necesscity to persist those varibale. So, you can declare those variables as transient. if the variable is declared as transient, then it will not be persisted. It is the main purpose of the transient keyword.

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