Serialization is done using ObjectOutputStream. Deserialization is the reverse process where the byte stream is used to recreate the actual Java object in memory. This mechanism is used to persist the object. Deserialization is done using ObjectInputStream.
Can we make interface 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 .
What is serialization interface?
Serializable is a marker interface (has no data member and method). It is used to “mark” Java classes so that the objects of these classes may get a certain capability. The Cloneable and Remote are also marker interfaces. The Serializable interface must be implemented by the class whose object needs to be persisted.
Which interface is used in serialization in Java?
The Java Serializable interface ( java. io. Serializable is a marker interface your classes must implement if they are to be serialized and deserialized. Java object serialization (writing) is done with the ObjectOutputStream and deserialization (reading) is done with the ObjectInputStream.
What are the methods in Serializable interface?
Serializable doesn’t contain any method, it’s the ObjectOutputStream and ObjectInputStream classes that can do that work, through the writeObject and readObject methods. Serializable is just a marker interface, in other words it just puts a flag, without requiring any fields or methods.
How do you serialize an object in Java?
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.
How do you serialize an object to a string in Java?
If you still want to write it down into a String you can encode the bytes using java. util. Base64. Still you should use CLOB as data type because you don’t know how long the serialized data is going to be.
How do you serialize?
To serialize an object
- Create the object and set its public fields and properties.
- Construct a XmlSerializer using the type of the object. …
- Call the Serialize method to generate either an XML stream or a file representation of the object’s public properties and fields.
Why do we serialize objects 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.
What is comparable interface in Java?
Java Comparable interface is used to order the objects of the user-defined class. This interface is found in java. lang package and contains only one method named compareTo(Object). It provides a single sorting sequence only, i.e., you can sort the elements on the basis of single data member only.
When should I implement Serializable interface?
So, implement the Serializable interface when you need to store a copy of the object, send them to another process which runs on the same system or over the network. Because you want to store or send an object. It makes storing and sending objects easy. It has nothing to do with security.
When should I use serialization in Java?
Serialization in Java allows us to convert an Object to stream that we can send over the network or save it as file or store in DB for later usage. Deserialization is the process of converting Object stream to actual Java Object to be used in our program.
What happens if the object to be serialized?
If the object to be serialized includes the references to other objects whose class implements serializable then all those object s state also will be saved as the part of the serialized state of the object in question.
How do you make a field transient in Java?
transient is a variables modifier used in serialization. At the time of serialization, if we don’t want to save value of a particular variable in a file, then we use transient keyword. When JVM comes across transient keyword, it ignores original value of the variable and save default value of that variable data type.
What is true about Serializable interface in Java?
Explanation: Serialization in Java is the process of turning object in memory into stream of bytes. … Explanation: Serializable interface does not have any method. It is also called a marker interface.