Java优学网CompletableFuture短文：异步编程实战指南，轻松解决多任务并行处理难题

CompletableFuture userFuture = CompletableFuture.supplyAsync(() ->

userRepository.findById(userId)

);

CompletableFuture orderFuture = inventoryService.checkStock(itemId)

.thenApply(stockInfo -> priceService.calculatePrice(stockInfo))
.thenApply(priceInfo -> riskService.verifyOrder(priceInfo));