Advanced Java CompletableFuture Features: Two Stage Completion Methods (Part 1)

This video discusses Java CompletableFuture's two-stage completion methods, which await the completion of two prior tasks. It focuses on the thenCombine() method, which is used to merge results of two CompletableFuture objects by applying a synchronous BiFunction in the calling thread. This method is useful for tasks, such as mathematical operations, that can be reduced and combined after asynchronous execution. For longer operations, the thenCombineAsync() method performs the combination in a separate thread, thereby preventing the main thread from blocking. This functionality enables structured and scalable concurrency by synchronizing outcomes from different asynchronous computation branches efficiently.