Java Executors Callable() Method25 Mar 2025 | 2 min read The Callable() method of Executors class returns a Callable object that, when called, runs the given task and returns null. SyntaxParameterstask - the task to run result - the result to return action - the privileged action to run Returna callable object ThrowNullPointerException Example 1Output: Sun Mar 17 02:29:46 IST 2019::pool-1-thread-1 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-2 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-3 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-4 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-5 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-6 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-7 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-8 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-9 Sun Mar 17 02:29:48 IST 2019::pool-1-thread-10 Example 2Output: ::pool-1-thread-1 ::pool-1-thread-2 ::pool-1-thread-3 ::pool-1-thread-4 ::pool-1-thread-5 Next TopicJava Executors |
Java Method The newCachedThreadPool() method of Executors class creates a thread pool that creates new threads as needed but will reuse iously constructed threads when they are available. Syntax public static ExecutorService newCachedThreadPool() public static ExecutorService newCachedThreadPool (ThreadFactory threadFactory) Parameter threadFactory - the factory to use when creating new threads Returns the...
3 min read
Java Executor privilegedThreadFactory() Method The privilegedThreadFactory() method of Executors class returns a thread factory used to create new threads that have the same permissions as the current thread. This factory creates threads with the same settings as defaultThreadFactory(), additionally setting the AccessControlContext and contextClassLoader of new...
3 min read
Java Executor class Factory and utility methods for Executor, ExecutorService, ScheduledExecutorService, ThreadFactory, and Callable classes defined in this package. This class supports the following kinds of methods: Methods that create and return an ExecutorService set up with commonly useful configuration settings. Methods that create and return a ScheduledExecutorService...
4 min read
Java Method The defaultThreadFactory() method of Executors class returns a default thread factory used to create new threads. This factory creates all new threads used by an Executor in the same ThreadGroup. If there is a SecurityManager, it uses the group of System. Syntax public static ThreadFactory...
3 min read
Java Executors newScheduledThreadPool() Method The newScheduledThreadPool() method of Executors class creates a thread pool that can schedule commands to run after a given delay or to execute periodically. Syntax Public static ScheduledExecutorService newScheduledThreadPool(int corePoolSize) public static ScheduledExecutorService newScheduledThreadPool(int corePoolSize, ThreadFactory threadFactory) Parameter corePoolSize - the number of threads to keep in...
2 min read
Java Executor Method The method of Executors class creates a work-stealing thread pool using the number of available processors as its target parallelism level. Syntax public static ExecutorService public static ExecutorService newWorkStealingPool(int parallelism) Parameter parallelism - the targeted parallelism level Returns the newly created thread pool Throw IllegalArgumentException Example 1 import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.ThreadPoolExecutor; import...
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Java Method The newSingleThreadExecutor() method of Executors class creates an Executor that uses a single worker thread operating off an unbounded queue. (Note however that if this single thread terminates due to a failure during execution before the shutdown, a new one will take its...
2 min read
Java Method The newFixedThreadPool() method of Executors class creates a thread pool that reuses a fixed number of threads operating off a shared unbounded queue. At any point, at most n Threads will be active processing tasks. If additional tasks are submitted when all threads...
3 min read
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