CHAPTER 27The Concurrency Utilities

From the start, Java has provided built-in support for multithreading and synchronization. For example, new threads can be created by implementing Runnable or by extending Thread; synchronization is available by use of the synchronized keyword; and interthread communication is supported by the wait( ) and notify( ) methods that are defined by Object. In general, this built-in support for multithreading was one of Java’s most important innovations and is still one of its major strengths.

However, as conceptually pure as Java’s original support for multithreading is, it is not ideal for all applications—especially those that make intensive use of multiple threads. For example, the original multithreading support ...

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