Types of ExecutorService in Java

Types of ExecutorService in Java

1. FixedThreadPool (Executors.newFixedThreadPool(int n)): Creates a pool with a fixed number of threads. Tasks are queued if all threads are busy. Ideal for consistent workloads.

2. CachedThreadPool (Executors.newCachedThreadPool()): Creates threads as needed and reuses idle ones. Threads are terminated after 60 seconds of inactivity. Suitable for short-lived tasks.

3. SingleThreadExecutor (Executors.newSingleThreadExecutor()): Uses a single thread to execute tasks sequentially. Ensures tasks are processed in order. Best for sequential task execution.

4. ScheduledThreadPool (Executors.newScheduledThreadPool(int corePoolSize)): Supports delayed and periodic task execution. Useful for scheduling tasks to run after a delay or at fixed intervals.

5. WorkStealingPool (Executors.newWorkStealingPool()): Uses a work-stealing algorithm with multiple threads (default: available processors). Efficient for parallel task execution with uneven workloads.