Future<?>成功調(diào)用后檢查由 a 中執(zhí)行的任務(wù)修改的字段是否安全future.get()？（是否保證完成設(shè)置值，并且我看到新值？）我會(huì)在調(diào)用future.get().或者我應(yīng)該只使用返回值future.get()而不應(yīng)該期望它像這樣工作？例子：class MyData {    private int a;    public void setA(int a) { this.a = a; }    public int getA() { return a; }}public class MainClass {    public static void main(String[] args) {        final Executor executor = Executors.newFixedThreadPool(15);        final List<MyData> objects = Arrays.asList(new MyData(), new MyData() /* ... */);        final Future<Void> future1 = CompletableFuture.supplyAsync(() -> { objects.get(0).setA(1); return null; }, executor);        final Future<Void> future2 = CompletableFuture.supplyAsync(() -> { objects.get(1).setA(2); return null; }, executor);        /* ... */        a.get();        b.get();        /* ... */        // Is it safe here to check the `a` field of the objects?        assert objects.get(0).getA() == 1;        assert objects.get(1).getA() == 2;    }}