842 Multithreading Chapter 15 born start ready running
842 Multithreading Chapter 15 born start ready running waiting sleeping dead blocked dispatch (assign a processor) quantum expiration issueI/Orequestsleepwait I/Ocompletionnotify complete ornotifyAll yield interrupt sleep interval expires Fig. 15.1State diagram showing the Life cycle of a thread. 15. When a running thread calls wait, the thread enters a waiting state for the particular object on which wait was called. One thread in the waiting state for a particular object becomes ready on a call to notify issued by another thread associated with that object. Every thread in the waiting state for a given object becomes ready on a call to notifyAll by another thread associated with that object. The wait, notify and notifyAll methods will be discussed in more depth shortly, when we consider monitors. A thread enters the dead state when its run method either completes or throws an uncaught exception. 15.4 Thread Priorities and Thread Scheduling Every Java applet or application is multithreaded. Every Java thread has a priority in the range Thread.MIN_PRIORITY (a constant of 1) and Thread.MAX_PRIORITY (a constant of 10). By default, each thread is given priority Thread.NORM_PRIORITY (a constant of 5). Each new thread inherits the priority of the thread that creates it. Some Java platforms support a concept called timeslicing and some do not. Without timeslicing, each thread in a set of equal-priority threads runs to completion (unless the thread leaves the running state and enters the waiting, sleeping or blocked state, or the
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