MessageSend

以及在 mysql 数据库中索引的工作机制是什么？ 有哪些数据库优化方面的经验? 数据库三范式是什么? 各大厂数据库面试热门考题

1 取字符串所有汉字首字母 2 取汉字字符串的首字母(A string of all the characters take the first letter of two characters to take the first letter of a string)

Date prototype get Day Source Code for Java Script.

使用Java蓝牙无线通讯技术API概述之二(The use of Java Bluetooth wireless communication technology of the two API Overview)

仓库管理系统，JAVA语言+SQL数据库 (Warehouse management system, JAVA+ SQL database language)

《Java案例开发》源代码( 考勤系统的完整实现！） 包括数据库 网络通讯＆uml("Java development case" source code (attendance the integrity of the system to achieve!) The database includes network communications & u ml)

说明：  涉设计顺序队列至少用一个内存空间解决假溢出问题，成员函数要有构造函数，入队列，出队列，非空否，并设计函数测试(Involved in the design queue order to solve at least leave with a memory overflow, member functions have a constructor, into the queue, the queue is not empty if, and design function test)

SQOOP2的java实例 创建连接，创建任务，执行任务(SQOOP2 demo)

使用A星（a-star）算发，通过上传二维矩阵中不能通过的坐标点，来为起止坐标点计算一条最短可通过路径(Using A-star, a shortest path is calculated by uploading the coordinate points that can not be passed in the two-dimensional matrix.)

说明：  JAVA入门到精通，这是一部为java初学者和爱好者编辑的书本(JAVA From entry to mastery)