Java list 获取元素

原文：
https://blog.csdn.net/qq_41574321/article/details/94634351
https://blog.csdn.net/weixin_30905981/article/details/99427319

Order order = orders.stream()
	.filter(item -> Func.equals(item.getPlatformOrderSn(), platformOrderSn))
	.findFirst()
	.orElse(null);

源码一览