Class List

Dec 6, 2023 | infoworld.com | Rafael Del Nero |Java Developer |boolean isEmpty |Class List

Abstract classes and interfaces are plentiful in Java code, and even in the Java Development Kit (JDK) itself. Each code element serves a fundamental purpose:Interfaces are a kind of code contract, which must be implemented by a concrete class. Abstract classes are similar to normal classes, with the difference that they can include abstract methods, which are methods without a body. Abstract classes cannot be instantiated.

Jul 15, 2023 | blog.csdn.net | Class List

【数组】day2 【数组】day1 目录 链表是通过指针将一个个节点串起来的数据结构，其优点是增删方便，灵活性强。以下将结合leetcode上的一些例题介绍链表的一些功能和应用。 class Solution { public: ListNode* removeElements(ListNode* head, int val) { ListNode* temp; while (head && head->val == val) { temp = head; head = head->next; } //得到新的头节点 temp = head; while (temp && temp->next)//不能交换顺序 { ListNode* temp2;//需要有辅助节点来辅助删除节点 while(temp->next && temp->next->val == val) { temp2 = temp->next; temp->next = temp->next->next; } temp = temp->next; } return head; } };...