Completabilefuture: from understanding to mastering, here are all you want to know

CompletableFuture1–FutureTask Architecture and simple use

CompletableFuture2–Future Analysis of advantages and disadvantages

CompletableFuture3- Introduction and use ( Create objects 、 Whether there is a return value asynchronous task 、 Callback function 、 The pit that needs attention )

CompletableFuture4- Get the result and interrupt the asynchronous task to get the default value

CompletableFuture5- Multistage asynchronous task execution ( Multiple asynchronous tasks are interdependent )

CompletableFuture6- Get the fastest thread task and result merge first