//1、创建栈:使用Stack类(尽管Stack是遗留类,更推荐使用Deque接口的实现如ArrayDeque)或Deque接口(及其实现类如ArrayDeque)来实现栈。 //Stack<Integer> stack = new Stack<Integer>(); Deque<Integer> laipuhuo.com stack = new ArrayDeque<>(); //2、入栈将元
Deque接口提供了更丰富的功能,而ArrayDeque和LinkedList则提供了高效的实现。 在大多数情况下,ArrayDeque是更好的选择,因为它在内存使用和性能上通常优于LinkedList。然而,如果你需要在列表中间频繁插入和删除元素,LinkedList可能是一个更好的选择。 // 使用ArrayDeque实现栈 Deque<Integer> stack = new ArrayDeque<>();...
Deque接口及其实现提供了一组更完整和一致的LIFO堆栈操作,应优先使用此类。例如:Deque<Integer> stack = new ArrayDeque<Integer>(); 然后在JavaDoc for Deque中这样说: 双端队列也可以用作LIFO(后进先出)堆栈。此接口应优先于旧版Stack类使用。当双端队列用作堆栈时,元素从双端队列的开头被压入并弹出。 大概意...
A more complete and consistent set of LIFO stack operations is provided by the Deque interface and its implementations, which should be used in preference to this class. For example:Deque<Integer> stack = new ArrayDeque<Integer>(); 然后在JavaDoc for Deque中这样说: Deques can also be used as...
import java.util.ArrayDeque; import java.util.Deque; public class IntegerStack { private Dequedata = new ArrayDeque(); public void push(Integer element) { data.addFirst(element); } public Integer pop() { return data.removeFirst(); }
Stack<Integer> s = new Stack(); s.push(1); s.push(2); s.push(3); s.push(4); System.out.println(s.size()); // 获取栈中有效元素个数---> 4 System.out.println(s.peek()); // 获取栈顶元素---> 4 s.pop(); // 4出栈,栈中剩余1 2 3,栈顶元素为3 ...
虽然Java 中有 Stack 这个类,但是呢,官方文档都说不让用了! 原因也很简单,因为 Vector 已经过被弃用了,而 Stack 是继承 Vector 的。 那么想实现 Stack 的语义,就用 ArrayDeque 吧: Deque<Integer> stack =newArrayDeque<>(); 参考:https://mp.weixin.qq.com/s/bVOSat47L0Hskfx9akAN6Q...
import java.util.ArrayDeque; import java.util.Deque; public class IntegerStack { private Deque<Integer> data = new ArrayDeque<Integer>(); public void push(Integer element) { data.addFirst(element); } public Integer pop() { return data.removeFirst(); ...
Deque<Integer> stack = new LinkedList<>(); //Deque<Integer> stack = new ArrayDeque<>(); stack.addFirst(3); stack.addFirst(6); stack.addFirst(9); System.out.println(stack); System.out.println(stack.peekFirst());// 返回栈顶元素并不删除 ...
For example:Deque<Integer> stack = new ArrayDeque<Integer>(); 而对Deque是这样描述的: Deques can also be used as LIFO (Last-In-First-Out) stacks. This interface should be used in preference to the legacy Stack class. When a deque is used as a stack, elements are pushed and popped fro...