<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[LingYaaa的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/LingYaaa</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; LingYaaa]]></copyright><item><title><![CDATA[Mysql]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/88808228</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/88808228</guid><author>LingYaaa</author><pubDate>Mon, 25 Mar 2019 22:38:42 +0800</pubDate><description><![CDATA[create database my-text character set utf8.

show databases.

use my-text.

show tables;查看有哪些表

create table student（int id，varchar（10） name）.创建表

desc student： 查看表

alter table student add score int....]]></description><category></category></item><item><title><![CDATA[Schema]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80865472</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80865472</guid><author>LingYaaa</author><pubDate>Sat, 30 Jun 2018 12:00:52 +0800</pubDate><description><![CDATA[不知道为什么怎么改sche代码都实现不了约束作用，知道在schema前面加了xs：终于可以实现&amp;lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&amp;gt;
&amp;lt;xs:schema xmlns:xs=&quot;http://www.w3.org/2001/XMLSchema&quot;
targetNamespace=&quot;http://www.w3.com&quot;
xmlns=&quot;http:/]]></description><category></category></item><item><title><![CDATA[Reflect]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80762476</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80762476</guid><author>LingYaaa</author><pubDate>Thu, 21 Jun 2018 17:06:52 +0800</pubDate><description><![CDATA[我给你ArrayList&amp;lt;Integer&amp;gt;的一个对象，我想在这个集合中添加一个字符串数据，如何实现呢？package Reflect;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;

/*
 * 我给你Arr...]]></description><category></category></item><item><title><![CDATA[JDKNews]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80761991</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80761991</guid><author>LingYaaa</author><pubDate>Thu, 21 Jun 2018 16:20:34 +0800</pubDate><description><![CDATA[package JDKNews;

public class Demo01Direction01 {
	// 创建几个实例
		public static final Demo01Direction01 FRONT = new Demo01Direction01();
		public static final Demo01Direction01 BEHIND = new Demo01Direct...]]></description><category></category></item><item><title><![CDATA[Net]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80755556</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80755556</guid><author>LingYaaa</author><pubDate>Thu, 21 Jun 2018 15:51:28 +0800</pubDate><description><![CDATA[ InetAddress类 • 封装计算机的ip地址 ,没有端口 //使用getLocalHost方法创建InetAddress对象 InetAddress addr = InetAddress.getLocalHost(); System.out.println(addr.getHostAddress());  //返回：192.168.1.110 System.out.println(add...]]></description><category></category></item><item><title><![CDATA[Graphical User Interface]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80749526</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80749526</guid><author>LingYaaa</author><pubDate>Thu, 21 Jun 2018 09:29:07 +0800</pubDate><description><![CDATA[as]]></description><category></category></item><item><title><![CDATA[Thread02]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80743786</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80743786</guid><author>LingYaaa</author><pubDate>Wed, 20 Jun 2018 13:09:25 +0800</pubDate><description><![CDATA[虽然我们可以理解同步代码块和同步方法的锁对象问题，但是我们并没有直接看到在哪里加上了锁，在哪里释放了锁， * 为了更清晰的表达如何加锁和释放锁,JDK5以后提供了一个新的锁对象Lock。 *  * Lock： * 		void lock()： 获取锁。 * 		void unlock():释放锁。   * ReentrantLock是Lock的实现类.package Thread02;
impor...]]></description><category></category></item><item><title><![CDATA[Pattern]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80742874</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80742874</guid><author>LingYaaa</author><pubDate>Wed, 20 Jun 2018 11:19:17 +0800</pubDate><description><![CDATA[
工厂模式package Pattern;

public class AnimalDemo01 {
	public static void main(String[] args) {
		// 具体类调用
		Dog01 d = new Dog01();
		d.eat();
		Cat01 c = new Cat01();
		c.eat();
		System.out.println(&quot;--...]]></description><category></category></item><item><title><![CDATA[Thread]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80730143</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80730143</guid><author>LingYaaa</author><pubDate>Tue, 19 Jun 2018 11:32:09 +0800</pubDate><description><![CDATA[进程： *		正在运行的程序，是系统进行资源分配和调用的独立单位。 *		每一个进程都有它自己的内存空间和系统资源。 *	线程： *		是进程中的单个顺序控制流，是一条执行路径 *		一个进程如果只有一条执行路径，则称为单线程程序。 *		一个进程如果有多条执行路径，则称为多线程程序。 * *  举例： *  	扫雷程序，迅雷下载 *   *  大家注意两个词汇的区别：并行和并发。 *		前者是逻...]]></description><category></category></item><item><title><![CDATA[IO流02]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80726872</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80726872</guid><author>LingYaaa</author><pubDate>Mon, 18 Jun 2018 22:48:57 +0800</pubDate><description><![CDATA[可以读写基本数据类型的数据 * 数据输入流：DataInputStream * 			DataInputStream(InputStream in) * 数据输出流：DataOutputStream * 			DataOutputStream(OutputStream out) package IO流02;
import java.io.DataInputStream;
import java.i...]]></description><category></category></item><item><title><![CDATA[IO流]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80718604</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80718604</guid><author>LingYaaa</author><pubDate>Sun, 17 Jun 2018 17:03:01 +0800</pubDate><description><![CDATA[IO流的分类： * 		流向： * 			输入流	读取数据 * 			输出流 写出数据 * 		数据类型： * 			字节流 * 				字节输入流	读取数据	InputStream * 				字节输出流	写出数据	OutputStream * 			字符流 * 				字符输入流	读取数据	Reader * 				字符输出流	写出数据	Writer *  * 		注意：一般我们在探讨IO流的...]]></description><category></category></item><item><title><![CDATA[递归]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80718511</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80718511</guid><author>LingYaaa</author><pubDate>Sun, 17 Jun 2018 14:47:05 +0800</pubDate><description><![CDATA[递归：方法定义中调用方法本身的现象 *  * 方法的嵌套调用，这不是递归。 * Math.max(Math.max(a,b),c); *  * public void show(int n) { * 		if(n &amp;lt;= 0) { * 			System.exit(0); * 		} * 		System.out.println(n); * 		show(--n); * } *  * 注意事项...]]></description><category></category></item><item><title><![CDATA[File]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80718206</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80718206</guid><author>LingYaaa</author><pubDate>Sun, 17 Jun 2018 14:26:28 +0800</pubDate><description><![CDATA[我们要想实现IO的操作，就必须知道硬盘上文件的表现形式。 * 而Java就提供了一个类File供我们使用。 *  * File:文件和目录(文件夹)路径名的抽象表示形式 * 构造方法： * 		File(String pathname)：根据一个路径得到File对象 * 		File(String parent, String child):根据一个目录和一个子文件/目录得到File对象 * 		...]]></description><category></category></item><item><title><![CDATA[Exception]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80717384</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80717384</guid><author>LingYaaa</author><pubDate>Sun, 17 Jun 2018 11:34:15 +0800</pubDate><description><![CDATA[程序的异常：Throwable * 		严重问题：Error 我们不处理。这种问题一般都是很严重的，比如说内存溢出。 * 		问题：Exception * 			编译期问题:不是RuntimeException的异常 必须进行处理的，因为你不处理，编译就不能通过。 * 			运行期问题:RuntimeException	这种问题我们也不处理，因为是你的问题，而且这个问题出现肯定是我们的代码不够严谨...]]></description><category></category></item><item><title><![CDATA[Map_Son]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80714623</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80714623</guid><author>LingYaaa</author><pubDate>Sat, 16 Jun 2018 22:48:15 +0800</pubDate><description><![CDATA[Map集合的特点： * 		将键映射到值的对象。一个映射不能包含重复的键；每个键最多只能映射到一个值。  *  * Map集合和Collection集合的区别? * 		Map集合存储元素是成对出现的，Map集合的键是唯一的，值是可重复的。可以把这个理解为：夫妻对 * 		Collection集合存储元素是单独出现的，Collection的儿子Set是唯一的，List是可重复的。可以把这个理解为：...]]></description><category></category></item><item><title><![CDATA[Collections]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80714620</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80714620</guid><author>LingYaaa</author><pubDate>Sat, 16 Jun 2018 19:06:10 +0800</pubDate><description><![CDATA[Collections:是针对集合进行操作的工具类，都是静态方法。 *  * 面试题： * Collection和Collections的区别? * Collection:是单列集合的顶层接口，有子接口List和Set。 * Collections:是针对集合操作的工具类，有对集合进行排序和二分查找的方法 *  * 要知道的方法 * public static &amp;lt;T&amp;gt; void sor...]]></description><category></category></item><item><title><![CDATA[Set_Son]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80712890</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80712890</guid><author>LingYaaa</author><pubDate>Sat, 16 Jun 2018 15:19:51 +0800</pubDate><description><![CDATA[Collection * 		|--List * 			有序(存储顺序和取出顺序一致),可重复 * 		|--Set * 			无序(存储顺序和取出顺序不一致),唯一 *  * HashSet：它不保证 set 的迭代顺序；特别是它不保证该顺序恒久不变。 * 注意：虽然Set集合的元素无序，但是，作为集合来说，它肯定有它自己的存储顺序， * 而你的顺序恰好和它的存储顺序一致，这代表不了有序，你可以...]]></description><category></category></item><item><title><![CDATA[Login_Regist]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80712869</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80712869</guid><author>LingYaaa</author><pubDate>Sat, 16 Jun 2018 14:32:37 +0800</pubDate><description><![CDATA[package Login_Regist;


/**
 * 这是针对用户进行操作的接口
 * 
 * @author 风清扬
 * @version V1.0
 * 
 */
public interface Demo01 {
	/**
	 * 这是用户登录功能
	 * 
	 * @param username
	 *            用户名
	 * @param password
	 *...]]></description><category></category></item><item><title><![CDATA[List_Son]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80706963</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80706963</guid><author>LingYaaa</author><pubDate>Fri, 15 Jun 2018 17:08:37 +0800</pubDate><description><![CDATA[List的子类特点： * 		ArrayList: * 			底层数据结构是数组，查询快，增删慢 * 			线程不安全，效率高 * 		Vector: * 			底层数据结构是数组，查询快，增删慢 * 			线程安全，效率低 * 		LinkedList: * 			 底层数据结构是链表，查询慢，增删快 * 			线程不安全，效率高package List_Son;
import java.uti...]]></description><category></category></item><item><title><![CDATA[JDK5News]]></title><link>https://blog.youkuaiyun.com/LingYaaa/article/details/80706622</link><guid>https://blog.youkuaiyun.com/LingYaaa/article/details/80706622</guid><author>LingYaaa</author><pubDate>Fri, 15 Jun 2018 16:22:26 +0800</pubDate><description><![CDATA[ArrayList存储字符串并遍历。要求加入泛型，并用增强for遍历。 * A:迭代器 * B:普通for * C:增强forpackage JDK5News;
import java.util.ArrayList;
import java.util.Iterator;

/*
 * ArrayList存储字符串并遍历。要求加入泛型，并用增强for遍历。
 * A:迭代器
 * B:普通for
 ...]]></description><category></category></item></channel></rss>