Coding and testing are generally considered separate areas of expertise. In this practical book, Java expert Scott Oaks takes the approach that anyone who works with Java should be adept at understanding how code behaves in the Java Virtual Machine—including the tunings likely to help performance. This updated second edition helps you gain in-depth knowledge of Java application performance using both the JVM and the Java platform. Developers and performance engineers alike will learn a variety of features, tools, and processes for improving the way the Java 8 and 11 LTS releases perform. While the emphasis is on production-supported releases and features, this book also features previews of exciting new technologies such as ahead-of-time compilation and experimental garbage collections. Understand how various Java platforms and compilers affect performance Learn how Java garbage collection works Apply four principles to obtain best results from performance testing Use the JDK and other tools to learn how a Java application is performing Minimize the garbage collector’s impact through tuning and programming practices Tackle performance issues in Java APIs Improve Java-driven database application performance

Threads are essential to Java programming, but learning to use them effectively is a nontrivial task. This new edition of the classic "Java Threads" shows you how to take full advantage of Java's threading facilities and brings you up-to-date with the watershed changes in Java 2 Standard Edition version 5.0 (J2SE 5.0). It provides a thorough, step-by-step approach to threads programming.

Java's threading system is simple relative to other threading systems. In earlier versions of Java, this simplicity came with tradeoffs: some of the advanced features in other threading systems were not available in Java. J2SE 5.0 changes all that: it provides a large number of new thread-related classes that make the task of writing multithreaded programs that much easier.

You'll learn where to use threads to increase efficiency, how to use them effectively, and how to avoid common mistakes. This book discusses problems like deadlock, race conditions, and starvation in detail, helping you to write code without hidden bugs.

"Java Threads," Third Edition, has been thoroughly expanded and revised. It incorporates the concurrency utilities from java.util.concurrent throughout. New chapters cover thread performance, using threads with Swing, threads and Collection classes, thread pools, and threads and I/O (traditional, new, and interrupted). Developers who cannot yet deploy J2SE 5.0 can use thread utilities provided in the Appendix to achieve similar functionality with earlier versions of Java.

Topics include:

Lock starvation and deadlock detection

Atomic classes and minimal synchronization (J2SE 5.0)

Interaction of Java threads with Swing, I/O, and Collection classes

Programmatically controlled locks and condition variables (J2SE 5.0)

Thread performance and security

Thread pools (J2SE 5.0)

Thread groups

Platform-specific thread scheduling

Task schedulers (J2SE 5.0)

Parallelizing loops for multiprocessor machines

In short, this new edition of "Java Threads" covers everything you need to know about threads, from the simplest animation program to the most complex applications. If you plan to do any serious work in Java, you will find this book invaluable.

Scott Oaks is a senior software engineer for the Java Performance Engineering group at Sun Microsystems and the author of four books in the O'Reilly Java series.

Formerly a senior systems engineer at Sun Microsystems, Henry Wong is an independent consultant working on various Java related projects.

O'Reilly's pioneering reference is the first and last word on this powerful distributed computing technology. JXTA in a Nutshell delivers all the information you need to get started, including an overview of P2P distributed computing, an explanation of the JXTA Project's new platform, and ways that developers can become a part of the development effort.

JXTA in a Nutshell introduces major concepts in a hands-on way by explaining them in context to the shell, and contains a complete reference to the JXTA application bindings. Also included is the full JXTA protocol specification. The book covers important topics such as security, and how the JXTA technology fits into the standard Java classes.

The second edition focuses on the platform features of Java that provide security--the class loader, bytecode verifier, and security manager--and recent additions to Java that enhance this security model: digital signatures, security providers, and the access controller. The book covers in depth the security model of Java 2, version 1.3, including the two new security APIs: JAAS and JSSE.