标签：div exception integer 方法 join() 结果 实现 oid 分析
CompletableFuture 实现了Futurn, CompletionStage，而CompletionStage有好多方法，需要慢慢探究，此次记录仅为CompletableFuture探索记录之一
先看部分源码：
public class CompletableFuture<T> implements Future<T>, CompletionStage<T> {.....}
public static void main(String[] args) { Integer result = CompletableFuture.supplyAsync(() -> { int a = 1; for (int i = 0; i < 10; i++) { a++; System.out.println(Thread.currentThread().getName() + " a++ " + a); try { Thread.sleep(1_000); } catch (InterruptedException e) { e.printStackTrace(); } } return a; }).thenCombineAsync(CompletableFuture.supplyAsync(() -> { int b = 1; for (int i = 0; i < 10; i++) { b++; System.out.println(Thread.currentThread().getName() + " b++ " + b); try { Thread.sleep(1_000); } catch (InterruptedException e) { e.printStackTrace(); } } return b; }), (a, b) -> a + b).join(); System.out.println(result);
运行结果：
ForkJoinPool.commonPool-worker-1 a++ 2 ForkJoinPool.commonPool-worker-2 b++ 2 ForkJoinPool.commonPool-worker-1 a++ 3 ForkJoinPool.commonPool-worker-2 b++ 3 ForkJoinPool.commonPool-worker-2 b++ 4 ForkJoinPool.commonPool-worker-1 a++ 4 ForkJoinPool.commonPool-worker-1 a++ 5 ForkJoinPool.commonPool-worker-2 b++ 5 ForkJoinPool.commonPool-worker-1 a++ 6 ForkJoinPool.commonPool-worker-2 b++ 6 ForkJoinPool.commonPool-worker-1 a++ 7 ForkJoinPool.commonPool-worker-2 b++ 7 ForkJoinPool.commonPool-worker-1 a++ 8 ForkJoinPool.commonPool-worker-2 b++ 8 ForkJoinPool.commonPool-worker-1 a++ 9 ForkJoinPool.commonPool-worker-2 b++ 9 ForkJoinPool.commonPool-worker-2 b++ 10 ForkJoinPool.commonPool-worker-1 a++ 10 ForkJoinPool.commonPool-worker-1 a++ 11 ForkJoinPool.commonPool-worker-2 b++ 11 22
可以看到两个supplyAsync()是异步在执行， thenCombineAsync()是合并异步执行完的结果
标签：div exception integer 方法 join() 结果 实现 oid 分析
原文地址：https://www.cnblogs.com/spring20190213dream/p/12034271.html
