qq_41835813的博客

后续还会补充新内容 笔记：https://www.notion.so/JDK-9a02ec4abe09439089306c0738559a0d 脑图：待续

Stack stack = new Stack(); stack.push("a"); stack.push("b"); stack.push("c"); stack.push("d"); System.out.println("stack.peek() = " + stack.peek()); System.out.println("stack.pop() = " + stack.pop())...

原理：https://blog.youkuaiyun.com/woshimaxiao1/article/details/83901113 用法： 只列出了与map不同的方法，其他的方法请参考：https://blog.youkuaiyun.com/qq_41835813/article/details/108540006 public class CHM { public static void main(String[] args) { ConcurrentHashMap concurr...

查看ArrayList实际容量 初始容量10 以1.5倍扩容，向下取值 22 public class ArrayListDemo { public static void main(String[] args) { ArrayList<Integer> squares = new ArrayList<Integer>(); for (int i = 1; i < 18; i++) square...

原理：https://blog.youkuaiyun.com/a724888/article/details/80290276?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.edu_weight&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.edu_weigh

原理：https://blog.youkuaiyun.com/woshimaxiao1/article/details/83748227 public class TreeMapDemo{ public static void main(String[] args) { TreeMap<String,String> map = new TreeMap<>(); map.put("1","qyc"); map.put("6","qy").

HashMap package com.qyc.map; import java.util.HashMap; import java.util.Map; import java.util.Set; /** * @author qyc * @time 2020/9/11 - 13:04 */ public class HashMapDemo { public static void main(String[] args) { Map<String,String&g.