CODEWITHSUNDEEP
javaoop
kaiwii ho
kaiwii ho

Reputation: 1407

what is the relationship of thread and task?

I know that Thread and Task are in different abstraction-level.But anyway,I'm still confused that what's the relationship of them.And,by the way,I think that the Task tells how to do a job and the Thread actually excute the job according to a Task instance.Is my understanding correct?thank u^

Upvotes: 1

Views: 428

Answers (4)

Laurent Legrand
Laurent Legrand

Reputation: 1144

Your understanding is correct.

We can do the analogy with workflow patterns where tasks are something that needs to be done in a process and threads are resources used to process or execute them.

Upvotes: 0

stacker
stacker

Reputation: 68992

A task is rather abstract it can be implemented as a process or a thread.

Upvotes: 0

Eran Zimmerman Gonen
Eran Zimmerman Gonen

Reputation: 4507

If by Task you mean something like this, then the difference is that the task is used to run some thread-like code execution, but has additional properties, such as when to run it, how many times, and the option to cancel its execution, whereas a thread will just go ahead and run once immediately.

Upvotes: 0

Tomasz Nurkiewicz
Tomasz Nurkiewicz

Reputation: 340933

I assume by Task you mean Runnable and Callable. The relationship is simple:

Thread might be used to execute multiple tasks

  • might - because you don't need a separate thread to execute tasks (well, technically, everything runs inside a thread - you don't need a separate one)

  • multiple - thread can be reused; it can run multiple tasks from a collection like queue

Typically one thread executes one Runnable passed to Thread constructor or multiple Callables passed to ExecutorService (wrapping thread pool in most cases).

Upvotes: 3

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