TCP/IP Sockets in Java: Practical Guide for Programmers (2nd by Michael J. Donahoo, Kenneth L. Calvert

By Michael J. Donahoo, Kenneth L. Calvert

The networking services of the Java platform were prolonged significantly because the first version of the publication. This re-creation covers model 1.5-1.7, the most up-tp-date iterations, in addition to making the subsequent improvements:

The API (application programming interface) reference sections in every one bankruptcy, which describe the proper components of every category, were changed with (i) a precis part that lists the sessions and techniques utilized in the code, and (ii) a ?gotchas? part that mentions nonobvious or poorly-documented features of the items.

In addition, the e-book covers a number of new periods and functions brought within the previous few revisions of the Java platform. New abstractions to be coated contain NetworkInterface, InterfaceAddress, Inet4/6Address, SocketAddress/InetSocketAddress, Executor, and others; prolonged entry to low-level community details; help for IPv6; extra whole entry to socket ideas; and scalable I/O. the instance code can be changed to use new language beneficial properties similar to annotations, enumerations, in addition to generics and implicit iterators the place appropriate.

Most net purposes use sockets to enforce community conversation protocols. This book's centred, tutorial-based technique is helping the reader grasp the projects and strategies necessary to almost all client-server initiatives utilizing sockets in Java. bankruptcy 1 presents a genral evaluation of networking options to permit readers to synchronize the strategies with terminology. bankruptcy 2 introduces the mechanics of straightforward consumers and servers. bankruptcy three covers easy message development and parsing. bankruptcy four then offers with concepts used to construct extra strong consumers and servers. bankruptcy five (NEW) introduces the scalable interface amenities which have been brought in Java 1.5, together with the buffer and channel abstractions. bankruptcy 6 discusses the connection among the programming constructs and the underlying protocol implementations in additional aspect. Programming options are brought via uncomplicated software examples followed by way of line-by-line code statement that describes the aim of each a part of this system. The book's site includes many examples of command-based sockets-related code mentioned in the course of the booklet. No different source provides so concisely or so successfully the fabric essential to wake up and working with Java sockets programming.

KEY FEATURES

* targeted, tutorial-based guideline in key sockets programming innovations permits reader to speedy arise to hurry on Java functions.
* Concise and up to date insurance of the latest platform (1.7) for Java
applications in networking technology
* presents code for all instance courses through a spouse website to allow the reader see the real items and techniques in context and to appreciate the aim of every line of code.

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Extra resources for TCP/IP Sockets in Java: Practical Guide for Programmers (2nd Edition) (The Practical Guides)

Example text

Disconnect() unsets the remote address and port, if any. The close() method indicates that the socket is no longer in use; further attempts to send or receive throw an exception. DatagramSocket: Addressing InetAddress getInetAddress() int getPort() SocketAddress getRemoteSocketAddress() InetAddress getLocalAddress() int getLocalPort() SocketAddress getLocalSocketAddress() The first method returns an InetAddress instance representing the address of the remote socket to which this socket is connected, or null if it is not connected.

4 for some pitfalls to avoid when using DatagramPackets. DatagramPacket: Creation DatagramPacket(byte[ ] DatagramPacket(byte[ ] DatagramPacket(byte[ ] DatagramPacket(byte[ ] DatagramPacket(byte[ ] DatagramPacket(byte[ ] data, data, data, data, data, data, int int int int int int length) offset, int length) length, InetAddress remoteAddr, int remotePort) offset, int length, InetAddress remoteAddr, int remotePort) length, SocketAddress sockAddr) offset, int length, SocketAddress sockAddr) These constructors create a datagram whose data portion is contained in the given byte array.

Terminate the client. length == 3) ? java 1. Application setup and parameter processing: lines 0–20 2. UDP socket creation: line 22 This instance of DatagramSocket can send datagrams to any UDP socket. We do not specify a local address or port so some local address and available port will be selected. We could explicitly set them with the setLocalAddress() and setLocalPort() methods or in the constructor, if desired. 3. Set the socket timeout: line 24 The timeout for a datagram socket controls the maximum amount of time (milliseconds) a call to receive() will block.

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