如何从CompletableFuture获得结果

each of "CompletableFuture.runAsync" mentioned in the code below does some calculations, an i want to get the results each time i call "CompletableFuture.runAsync". or in other words, i want each of "future0,future1,future2,future3" to contain the result of each call to "CompletableFuture.runAsync" respectivelyeach of "CompletableFuture.runAsync" mentioned