This chapter gives a good understanding on the following two subjects − Socket Programming − This is the most widely used concept in Networking and it has been explained in very detail. Java Socket Programming with UDP-example. In this Java Network programming tutorial, you will learn how to code a client/server application based on UDP protocol. The term socket programming refers to writing programs that execute across multiple computers in which the devices are all connected to each other using a network. A datagram is an independent, self-contained message sent over the network whose arrival, arrival time, and content are not guaranteed. UDP − UDP stands for User Datagram Protocol, a connection-less protocol that allows for packets of data to be transmitted between applications. The first statement creates an array of bytes which is then used to create a DatagramPacket.The DatagramPacket will be used to receive a datagram from the socket because of the constructor used to create it. Therefore to perform networking operations over UDP, we only need to import the classes from the java.net package: java.net.DatagramSocket and java.net.DatagramPacket. There are two communication protocols that one can use for socket programming: User Datagram Protocol (UDP… The DatagramPacket and DatagramSocket classes in the java.net package implement system-independent datagram communication using UDP. Java DatagramSocket class represents a connection-less socket for sending and receiving datagram packets. The setup is very straightforward too. What Is a Datagram?

A Simple Java UDP Server and UDP Client September 17, 2008 / 44 Comments / in Code Samples , Java , Software / by Dave For a class I am taking, we are testing out a simple UDP Server and UDP Client to demonstrate what each one does and how sockets work.

So , from the above discussion it is clear that UDP is connection less and less reliable protocol.But it is faster when comparing with TCP.In this chapter , we are discussing how to use UDP in our applications with a suitable example. Java ships with built-in networking support for UDP – which is part of the java.net package. This constructor requires only two arguments: a byte array that contains client-specific data and the length of the byte array. First, let’s see how Java Network API is designed to support development of network applications that make use of UDP. Java DatagramSocket and DatagramPacket classes are used for connection-less socket programming. A datagram is basically an information but there is no guarantee of its content, arrival or arrival time.



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