java多线程程序设计详细解析（Java multithreaded programming, detailed analysis）.docVIP

java多线程程序设计详细解析（Java multithreaded programming, detailed analysis） Java multithreaded programming, detailed analysis First, understand multithreading Multithreading is a mechanism that allows concurrent execution of multiple instruction streams, each of which is called a thread, independent of each other. The thread is also known as lightweight processes, and its execution control process as an independent, the operating system is responsible for scheduling, the difference lies in the thread does not have a separate storage space, but other thread belongs in the process of sharing a storage space, which makes the communication between threads is far lower than the simple process. The execution of multiple threads is concurrent, that is, simultaneous in logic, regardless of whether it is physically simultaneous. If the system is only a CPU, then the real and is not possible, but due to the speed of CPU, the user can not feel the difference, so we dont care about it, just imagine that each thread can be executed at the same time is. The difference of multi thread and the traditional single thread maximum on the program design is due to the control flow of each thread independently of each other, so that each thread between the code is out of order execution, thread scheduling the synchronization problem in the later discussion. Two: to achieve multi-threaded in Java We might imagine what we need to do to create a new thread Obviously, we have to specify the code to be executed by this thread, and thats all we need to do with multithreading in Java! What a wonder! How does Java do this? Through class! As a fully object-oriented language, Java provides the java.lang.Thread to facilitate the multi thread programming, this class provides a number of methods to facilitate us to control the various threads of their own, our future discussion will focus on the class. So, how do we provide Java with code that we want threads to execute? Lets take a look at the Thread class. T