What does serializable interface do in Java?

How does Serializable interface work?

To serialize an object means to convert its state to a byte stream so that the byte stream can be reverted back into a copy of the object. A Java object is serializable if its class or any of its superclasses implements either the java. io. Serializable interface or its subinterface, java.

Why do we need serialization in Java?

In Java, we create several objects that live and die accordingly, and every object will certainly die when the JVM dies. … Well, serialization allows us to convert the state of an object into a byte stream, which then can be saved into a file on the local disk or sent over the network to any other machine.

Why is serialize () important?

Serialization allows the developer to save the state of an object and re-create it as needed, providing storage of objects as well as data exchange. Through serialization, a developer can perform actions such as: Sending the object to a remote application by using a web service.

Can an interface be Serializable?

4 Answers. Yes, you can extend the Serializable interface. If you do, all classes that implement the new subinterface will also be implementing Serializable .

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What will happen if we don’t implement Serializable?

3 Answers. The Student would not be Serializable, and it will act like a normal class. Serialization is the conversion of an object to a series of bytes, so that the object can be easily saved to persistent storage or streamed across a communication link.

Is string Serializable in Java?

The String class and all the wrapper classes implement the java. io. Serializable interface by default.

What is true Serialization?

Explanation: Serialization in Java is the process of turning object in memory into stream of bytes. 3. … Explanation: Serializable interface does not have any method. It is also called a marker interface.

How does a marker interface work internally?

A marker interface is an interface that has no methods or constants inside it. It provides run-time type information about objects, so the compiler and JVM have additional information about the object. A marker interface is also called a tagging interface.

Can we serialize final variable in Java?

transient and final : final variables are directly serialized by their values, so there is no use/impact of declaring final variable as transient.

What is data serialization in Java?

Serialization is the conversion of the state of an object into a byte stream; deserialization does the opposite. Stated differently, serialization is the conversion of a Java object into a static stream (sequence) of bytes which can then be saved to a database or transferred over a network.