[Lambda表达式](Lambda%E8%A1%A8%E8%BE%BE%E5%BC%8F.md) [常用函数式接口](%E5%B8%B8%E7%94%A8%E5%87%BD%E6%95%B0%E5%BC%8F%E6%8E%A5%E5%8F%A3.md) [stream流](stream%E6%B5%81.md)