<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_45981503的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_45981503</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_45981503]]></copyright><item><title><![CDATA[PostgreSQL 返回多行多列 返回一张表 查询空表]]></title><link>https://blog.youkuaiyun.com/qq_45981503/article/details/128413221</link><guid>https://blog.youkuaiyun.com/qq_45981503/article/details/128413221</guid><author>qq_45981503</author><pubDate>Thu, 22 Dec 2022 20:35:08 +0800</pubDate><description><![CDATA[PostgreSQL 返回多行多列 返回数据表集合 列表]]></description><category></category></item><item><title><![CDATA[vbs打开多个程序]]></title><link>https://blog.youkuaiyun.com/qq_45981503/article/details/128406504</link><guid>https://blog.youkuaiyun.com/qq_45981503/article/details/128406504</guid><author>qq_45981503</author><pubDate>Thu, 22 Dec 2022 11:32:28 +0800</pubDate><description><![CDATA[vbs脚本]]></description><category></category></item><item><title><![CDATA[彻底卸载jdk，jdk安装 ，javaa安装，jdk删除干净]]></title><link>https://blog.youkuaiyun.com/qq_45981503/article/details/128013250</link><guid>https://blog.youkuaiyun.com/qq_45981503/article/details/128013250</guid><author>qq_45981503</author><pubDate>Thu, 24 Nov 2022 10:43:07 +0800</pubDate><description><![CDATA[jdk卸载、java环境配置]]></description><category></category></item><item><title><![CDATA[ArrayList 集合扩容]]></title><link>https://blog.youkuaiyun.com/qq_45981503/article/details/124681501</link><guid>https://blog.youkuaiyun.com/qq_45981503/article/details/124681501</guid><author>qq_45981503</author><pubDate>Tue, 10 May 2022 09:56:29 +0800</pubDate><description><![CDATA[ArrayList 初始容量：10 扩容因子：1，当容量达到上限后才会触发扩容。

扩容公式：新容量 = 旧容量/2 + 旧容量 + 1
比如：初始容量为4，其容量的每次扩充后的新容量为：4-&gt;7-&gt;11-&gt;17-&gt;26-&gt;...
即每次扩充至原有基础的1.5倍





Vector 初始容量：10 扩容因子：1，当容量达到上限后才会触发扩容。

扩容公式：old*2 如：一次扩容为20、二次扩容为40





HashSet 初始容量：16（Hashset是基于Has..]]></description><category></category></item></channel></rss>