[集合分类](%E9%9B%86%E5%90%88%E5%88%86%E7%B1%BB.md) [List常用操作](List%E5%B8%B8%E7%94%A8%E6%93%8D%E4%BD%9C.md) [Set常用操作](Set%E5%B8%B8%E7%94%A8%E6%93%8D%E4%BD%9C.md) [Map常用操作](Map%E5%B8%B8%E7%94%A8%E6%93%8D%E4%BD%9C.md)