We’ll create a linked list, add some elements to it and iterate over it. import java.util.LinkedList; import java.util.List; public class LinkedListExample { public static void main(String[] args) { // Create a new list of type linkedlist LinkedList<String> list = new LinkedList<>();...
If index equals to the length of linked list, the node will be appended to the end of linked list. If index is greater than the length, the node will not be inserted. */ publicvoidaddAtIndex(intindex,intval){ // Create a new node with value data NodecurNode=newNode(val); Nodeprev...
AI代码解释 publicclassDatabaseSearchimplementsSearch{@OverridepublicList<String>searchDoc(String keyword){System.out.println("数据搜索 "+keyword);returnnull;}} resources 接下来可以在resources下新建META-INF/services/目录,然后新建接口全限定名的文件:com.cainiao.ys.spi.learn.Search,里面加上我们需要用到的...
并且失去了元素的插入顺序信息,也就是说使用 Iterator 遍历 HashSet 得到的结果是不确定的。 LinkedHashSet:具有 HashSet 的查找效率,并且内部使用双向链表维护元素的插入顺序。 2. List ArrayList:基于动态数组实现,支持随机访问。 Vector:和 ArrayList 类似,但它是线程安全的。 LinkedList:基于双向链表实现,只能顺序...
*Doubly-linked list implementation of the {@code List} and {@code Deque}*interfaces. Implements all optional list operations, and permits all*elements (including {@code null}).**All of the operations perform as could be expected for a doubly-linked *list...
A special#LinkedHashMap(int,float,boolean) constructoris provided to create a linked hash map whose encounter order is the order in which its entries were last accessed, from least-recently accessed to most-recently (access-order). This kind of map is well-suited to building LRU caches. Invo...
=null) map.set(this, value); elsecreateMap(t, value); } ThreadLocalMap是Thread类持有的属性：publicclassThreadimplementsRunnable { ...ThreadLocal.ThreadLocalMapthreadLocals=null; ...ThreadLocal的实现是这样的：每个Thread 维护一个 ThreadLocalMap 映射表，这个映射表的 key 是 ThreadLocal ...
public class DatabaseSearch implements Search{@Overridepublic List<String> searchDoc(String keyword) {System.out.println("数据搜索 "+keyword);return null;}} resources 接下来可以在resources下新建META-INF/services/目录,然后新建接口全限定名的文件:com.cainiao.ys.spi.learn.Search,里面加上我们需要用到的...
public class BinaryTree { TreeNode root; class TreeNode{ int value; TreeNode left; TreeNode right; public TreeNode(int paraValue) { this.value = paraValue; } } public BinaryTree(int[]array) { root = createBinaryTreeByArray(array, 0); } private TreeNode createBinaryTreeByArray(int []...
ConcurrentLinkedQueue:这是一个线程安全的队列实现,使用了非阻塞算法。 BlockingQueue接口的实现类,如ArrayBlockingQueue,LinkedBlockingQueue等。 CopyOnWriteArrayList和CopyOnWriteArraySet:这是两个线程安全的集合,它们在修改操作时复制一份数据,避免了修改时的并发问题。 ConcurrentHashMap:这是一个线程安全的HashMap,它通过...