Callable
public
interface
Callable
java.util.concurrent.Callable<V> |
A task that returns a result and may throw an exception.
Implementors define a single method with no arguments called
call
.
The Callable
interface is similar to Runnable
, in that both are designed for classes whose
instances are potentially executed by another thread. A
Runnable
, however, does not return a result and cannot
throw a checked exception.
The Executors
class contains utility methods to
convert from other common forms to Callable
classes.
See also:
Summary
Public methods | |
---|---|
abstract
V
|
call()
Computes a result, or throws an exception if unable to do so. |
Public methods
call
V call ()
Computes a result, or throws an exception if unable to do so.
Returns | |
---|---|
V |
computed result |
Throws | |
---|---|
Exception |
if unable to compute a result |
Interfaces
- BlockingDeque
- BlockingQueue
- Callable
- CompletableFuture.AsynchronousCompletionTask
- CompletionService
- CompletionStage
- ConcurrentMap
- ConcurrentNavigableMap
- Delayed
- Executor
- ExecutorService
- ForkJoinPool.ForkJoinWorkerThreadFactory
- ForkJoinPool.ManagedBlocker
- Future
- RejectedExecutionHandler
- RunnableFuture
- RunnableScheduledFuture
- ScheduledExecutorService
- ScheduledFuture
- ThreadFactory
- TransferQueue
Classes
- AbstractExecutorService
- ArrayBlockingQueue
- CompletableFuture
- ConcurrentHashMap
- ConcurrentHashMap.KeySetView
- ConcurrentLinkedDeque
- ConcurrentLinkedQueue
- ConcurrentSkipListMap
- ConcurrentSkipListSet
- CopyOnWriteArrayList
- CopyOnWriteArraySet
- CountDownLatch
- CountedCompleter
- CyclicBarrier
- DelayQueue
- Exchanger
- ExecutorCompletionService
- Executors
- ForkJoinPool
- ForkJoinTask
- ForkJoinWorkerThread
- FutureTask
- LinkedBlockingDeque
- LinkedBlockingQueue
- LinkedTransferQueue
- Phaser
- PriorityBlockingQueue
- RecursiveAction
- RecursiveTask
- ScheduledThreadPoolExecutor
- Semaphore
- SynchronousQueue
- ThreadLocalRandom
- ThreadPoolExecutor
- ThreadPoolExecutor.AbortPolicy
- ThreadPoolExecutor.CallerRunsPolicy
- ThreadPoolExecutor.DiscardOldestPolicy
- ThreadPoolExecutor.DiscardPolicy
Enums
Exceptions