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mysql 1449 ： The user specified as a definer ('root'@'%') does not exist 解决方法权限问题，授权 给 root 所有sql 权限mysql> grant all privileges on *.* to root@"%" ide... 阅读全文
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1 package com.lovo.util; 2 3 import java.lang.reflect.Constructor; 4 import java.lang.reflect.Field; 5 6 public class MyUtil { 7 private MyUtil... 阅读全文
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如果13号是星期五，就称为“黑色星期五”，好像是耶稣死的日子 1 package com.fj; 2 3 import java.util.Calendar; 4 5 public class BlackFriday { 6 private static final int CURREN... 阅读全文
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1,连接mysql数据库 1 package com.lovo; 2 3 import java.sql.Connection; 4 import java.sql.DriverManager; 5 import java.sql.ResultSet; 6 import java.sql.SQLE... 阅读全文
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1 package com.lovo.threadpool; 2 3 public class ThreadOfPool extends Thread{ 4 private Runnable task = null; 5 private ThreadPool threadPool... 阅读全文
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1 package com.lovo; 2 3 public class SuperLinkedList { 4 private int size; 5 private SuperLinkedListNode firstNode; 6 private Supe... 阅读全文
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1 package greedySnaker; 2 3 import java.awt.Graphics; 4 import java.util.LinkedList; 5 6 /** 7 * 蛇类 8 * @author 俊霖 9 * 10 */ 11 public... 阅读全文
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1 private Image offImage = new BufferedImage(800, 700, BufferedImage.TYPE_INT_RGB);//在内存中new一张图片出来 1 public void paint(Graphics g) { 2 Graphic... 阅读全文
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1 public class Singleton { 2 3 private static Singleton singleton; 4 //懒汉式单例 5 private static Singleton singleton; 6 private Singlet... 阅读全文
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1 package com.lovo; 2 3 import java.awt.BasicStroke; 4 import java.awt.Color; 5 import java.awt.Graphics; 6 import java.awt.Graphics2D; 7 imp... 阅读全文