一、概述 future1 = CompletableFuture.runAsync(() -> { System.out.println(Thread.currentThread().getName() +"\t future1"); }); System.out.println("future1.get() ="+ future1.get()); CompletableFuture future2 = CompletableFuture.supplyAsync(() -> { System.out.println(Thread.currentThread().getName() +"\t future2"); // int i = 10 / 0; return 1024; }); Integer result = future2.whenComplete((t, u) -> { System.out.println("============>t："+ t); System.out.println("============>u："+ u); }).exceptionally(f -> { System.out.println("============>exception："+ f.getMessage()); return 444; }).get(); System.out.println("result ="+ result); } }