![import java.io.*;
class Depersist{
public static void main(String args[])throws Exception{
ObjectInputStream in=new ObjectInputStream(new FileInputStream("f.txt"))
;
Student s=(Student)in.readObject();
System.out.println(s.id+" "+s.name);
in.close();
}
}
OP : 211 ravi](https://image.slidesharecdn.com/13243967-200908072612/85/13243967-5-320.jpg)
![Example of Java Deserialization
import java.io.*;
class Depersist{
public static void main(String args[])throws Exception{
ObjectInputStream in=new ObjectInputStream(new FileInputStream("f.txt"))
;
Student s=(Student)in.readObject();
System.out.println(s.id+" "+s.name);
in.close();
}
}
211 ravi](https://image.slidesharecdn.com/13243967-200908072612/85/13243967-7-320.jpg)
13243967
- 1. Object Serialization in Java • Serialization in java is a mechanism of writing the state of an object into a byte stream. • It is mainly used in Hibernate, RMI, JPA, EJB and JMS technologies. • The reverse operation of serialization is called deserialization. • Advantage of Java Serialization • It is mainly used to travel object's state on the network (known as marshaling).
- 3. java.io.Serializable interface import java.io.Serializable; public class Student implements Serializable { int id; String name; public Student(int id, String name) { this.id = id; this.name = name; } } • In the above example, Student class implements Serializable interface. Now its objects can be converted into stream.
- 4. ObjectOutputStream class • The ObjectOutputStream class is used to write primitive data types and Java objects to an OutputStream. Only objects that support the java.io.Serializable interface can be written to streams.
- 5. import java.io.*; class Depersist{ public static void main(String args[])throws Exception{ ObjectInputStream in=new ObjectInputStream(new FileInputStream("f.txt")) ; Student s=(Student)in.readObject(); System.out.println(s.id+" "+s.name); in.close(); } } OP : 211 ravi
- 6. Deserialization in java • Deserialization is the process of reconstructing the object from the serialized state.It is the reverse operation of serialization. ObjectInputStream class • An ObjectInputStream deserializes objects and primitive data written using an ObjectOutputStream.
- 7. Example of Java Deserialization import java.io.*; class Depersist{ public static void main(String args[])throws Exception{ ObjectInputStream in=new ObjectInputStream(new FileInputStream("f.txt")) ; Student s=(Student)in.readObject(); System.out.println(s.id+" "+s.name); in.close(); } } 211 ravi
- 8. (Internet Inter-ORB Protocol) • IIOP (Internet Inter-ORB Protocol) is a protocol that makes it possible for distributed programs written in different programming languages to communicate over the Internet.
- 9. • The distributed Hello World example uses a client application to make a remote method call via IIOP to a server running on the host from which the client was downloaded. When the client runs, "Hello from MARS!" is displayed.
- 10. • The steps to write the source files • The steps to compile the example • The steps to run the example Write or Download the Source Files There are three tasks to complete in this section: • Define the functions of the remote class as an interface written in the Java programming language • Write the implementation class • Write the server class • Write a client program that uses the remote service
- 11. • The source files used in this tutorial are: HelloInterface.java - a remote interface • HelloImpl.java - a remote object implementation that implements HelloInterface • HelloServer.java - an RMI server that creates an instance of the remote object implementation and binds that instance to a name in the Naming Service • HelloClient.java - a client application that invokes the remote method, sayHello()