Thread.ppt
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Threads allow multiple tasks to run concurrently within a single process. Threads have their own call stack and can run asynchronously, allowing programs to take advantage of multiprocessor systems and perform background tasks. A thread goes through various states in its lifecycle including new, runnable, running, blocked, and terminated. When first created, a thread is new; it then becomes runnable when start() is called but may not run immediately if the scheduler chooses another thread.
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Thread.ppt
- 2. THREAD Threading is a facility to allow multiple activities to coexist within a single process. Threads are sometimes referred to as lightweight processes. Like processes, threads are independent, concurrent paths of execution through a program, and each thread has its own stack. 2
- 3. Why use threads? •Take advantage of multiprocessor systems •Simplify modeling •Perform asynchronous or background processing 3
- 4. Life cycle of a Thread (Thread States) The life cycle of the thread in java is controlled by JVM. The java thread states are as follows: New Runnable Running Non-Runnable (Blocked) Terminated 4
- 5. Life cycle of a Thread 5
- 6. Life cycle of a Thread 1) New The thread is in new state if you create an instance of Thread class but before the invocation of start() method. 2) Runnable The thread is in runnable state after invocation of start() method, but the thread scheduler has not selected it to be the running thread. 3) Running The thread is in running state if the thread scheduler has selected it. 6
- 7. Life cycle of a Thread 4) Non-Runnable (Blocked) This is the state when the thread is still alive, but is currently not eligible to run. 5) Terminated A thread is in terminated or dead state when its run() method exits. 7
- 8. Thank you 8