The Techno Journals

CompletableFuture CompletableFuture was introduced in Java 8 to support the asynchronous execution and avoid blocking calls. It implements Future and CompletionStage interfaces. Future can be used to retrieve the value and status of current task while CompletionStage provides multiple methods to support the event based task execution which helps in creating a chain or pipeline for the actions to happen during specified events. Runnable Runnable interface has a void run() method where we can write the logic which we want to execute but it can not return any result. Runnable can be executed using Thread or ExecutorService. public abstract void run(); When we need to execute some tasks where we don't need to wait to get some result back then we can use Runnable. We just execute our task and do other work as we don't depend on the result of the task. Like if we want to write some logs asynchronously then we can use Runnable interface and execute without waiting for it...