Which classes are used for serialization process?
For serializing the object, we call the writeObject() method of ObjectOutputStream class, and for deserialization we call the readObject() method of ObjectInputStream class. We must have to implement the Serializable interface for serializing the object.
What is use of serialization in Java?
Serialization is simply turning an existing object into a byte array. This byte array represents the class of the object, the version of the object, and the internal state of the object. This byte array can then be used between JVM’s running the same code to transmit/read the object.
Is every Java class Serializable?
Only Classes That Implement Serializable Can Be Serialized
Any class that implements Serializable interface directly or through its parent can be serialized, and classes that do not implement Serializable can not be serialized.
Which of the following class object is Serializable?
A Java object is only serializable. if a class or any of its superclasses implements either the java. io. Serializable interface or its subinterface, java.
What happens during serialization?
Serialization is the process of converting an object into a stream of bytes to store the object or transmit it to memory, a database, or a file. Its main purpose is to save the state of an object in order to be able to recreate it when needed. The reverse process is called deserialization.
What is true serialization?
Serialization provides a way where an object can be represented as a sequence of bytes which includes the object’s data and information having the object’s type and the types of data stored in the object. It can only be read from the file after the serialized object is written into a file.
Why do we need serialization ID in Java?
Simply put, we use the serialVersionUID attribute to remember versions of a Serializable class to verify that a loaded class and the serialized object are compatible. The serialVersionUID attributes of different classes are independent. Therefore, it is not necessary for different classes to have unique values.
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.
Is serializable inherited Java?
There are some cases of Serialization with respect to inheritance : Case 1: If superclass is serializable then subclass is automatically serializable : If superclass is Serializable, then by default every subclass is serializable.
Can abstract class be serialized in Java?
However, even though most abstract classes don’t implement Serializable , they may still need to allow their subclasses to do so, if desired. … If the abstract class has no state, then it can simply provide a no-argument constructor to its subclasses.