This post explores how virtual threads in Java 21+ provide an elegant solution for converting legacy Future objects into CompletableFuture instances. Since Java 8, the CompletableFuture API provides a convenient way for performing asynchronous operations in a functional, composable way. This makes it very simple to call some long-running methods—for instance involving external I/O—asynchronously and process each result as soon as it is available, without blocking on any threads:| www.morling.dev