sleep() VS yield() VS join()
Difference between
sleep(), yield() and join()
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sleep():- Pauses the current thread for a specified time without releasing locks.
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yield():- Temporarily pauses the current thread to give other threads of equal priority a chance to execute.
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join():- Makes the current thread wait until the specified thread completes its execution.
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The following table highlights the key differences between
sleep(),yield()andjoin()methods in Java:
| Property | sleep() | yield() | join() |
|---|---|---|---|
| Purpose | Pauses the execution of the current thread for a specified duration, allowing other threads to run during this time. | Temporarily pauses the current thread and gives a chance for other threads of equal priority to execute. | Causes the current thread to wait until the specified thread completes its execution before proceeding. |
| Examples | Timers, presentations (PPT auto-change), blinking indicators. | Shopping tasks, CPU-sharing scenarios. | License department processing: waiting for one task to finish before starting the next. |
| How the Thread Invokes Again? | Automatically after the specified sleep duration ends or if the thread is interrupted. | Automatically resumes after other threads of equal priority get execution or the scheduler decides. | Resumes execution after the target thread completes its task or after a specified waiting time if a timed join is used. |
| Methods |
• sleep(long ms)• sleep(long ms, int ns)
|
yield() |
• join()• join(long ms) • join(long ms, int ns)
|
| Method Overloaded? | Yes | No | Yes |
| Exception | Throws InterruptedException |
None | Throws InterruptedException |
| Is Method Final? | Yes | No | Yes |
| Is Method Static? | Yes | Yes | No |
| Is Method Native? |
• sleep(long ms) → native• sleep(long ms, int ns) → non-native
|
Yes | No |
| Thread State Transition | Running → Timed Waiting | Running → Runnable | Running → Waiting |
| Guarantee | Guarantees thread pauses for the specified time. | No guarantee; thread may continue or other threads may run. | Guarantees current thread waits until the target thread completes. |
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