Sengo的博客

Set HashMap Reference:https://blog.youkuaiyun.com/jiary5201314/article/details/51439982 HashMapis a Map based collection class that is used for storing Key & value pairs. Structure: It has an ...

JAVA一些语法整理： Queue: Queue<String> queue = new LinkedList<String>(); queue.offer("a"); // 添加一个元素并返回true queue.poll(); // get and pop the first element queue.peek(); // 返回队列头部的元素 ...