By Cay S. Horstmann, Gary Cornell
Totally up-to-date to mirror Java SE 7 language alterations, Core Java®, quantity II—Advanced beneficial properties, 9th Edition, is the definitive advisor to Java’s strongest beneficial properties for company and machine software development.
Designed for critical programmers, this trustworthy, independent, no-nonsense instructional illuminates complex Java language and library good points with completely proven code examples. As in past variants, all code is simple to appreciate and screens glossy best-practice strategies to the realworld demanding situations confronted via expert developers.
Volume II fast brings you up-to-speed on key Java SE 7 improvements, starting from the hot dossier I/O API to stronger concurrency utilities. All code examples are up-to-date to mirror those improvements. whole descriptions of latest language and platform good points are highlighted and built-in with insightful factors of complicated Java programming concepts. You’ll research all you want to construct strong construction software program with
- Streams, records, and commonplace expressions
- Database programming facilities
- JNDI/LDAP listing integration
- Advanced Swing techniques
- JavaBeans components
- Web services
- Advanced platform protection features
- Distributed objects
- Native tools, and extra
For specific insurance of basic Java SE 7 gains, together with items, periods, inheritance, interfaces, mirrored image, occasions, exceptions, pics, Swing, generics, collections, concurrency, and debugging, search for middle Java™, quantity I—Fundamentals, 9th version (ISBN-13: 978-0-13-708189-9).
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Additional info for Core Java, Volume 2: Advanced Features (9th Edition)
3 Message Bodies The JMS API defines five message body formats, also called message types, which allow you to send and to receive data in many different forms and provide compatibility with existing messaging formats. 2 describes these message types. String object (for example, the contents of an Extensible Markup Language file). MapMessage A set of name/value pairs, with names as String objects and values as primitive types in the Java programming language. The entries can be accessed sequentially by enumerator or randomly by name.
You can use the setPriority method of the MessageProducer interface to set the priority level for all messages sent by that producer. • You can use the long form of the send or the publish method to set the priority level for a specific message. The third argument sets the priority level. NON_PERSISTENT, 3, 10000); The ten levels of priority range from 0 (lowest) to 9 (highest). If you do not specify a priority level, the default level is 4. A JMS provider tries to deliver higher-priority messages before lower-priority ones but does not have to deliver messages in exact order of priority.
The most reliable way to produce a message is to send a PERSISTENT message within a transaction. JMS messages are PERSISTENT by default. A transaction is a unit of work into which you can group a series of operations, such as message sends and receives, so that the operations either all succeed or all fail. 2 on page 70. The most reliable way to consume a message is to do so within a transaction, either from a nontemporary queue—in the PTP messaging domain—or from a durable subscription—in the pub/sub messaging domain.