Java 7 发布不到一年 份额达 23%
ZeroTurnaround（JRebel开发商）近日进行了一项抽样统计，统计结果显示，7126651.html">Java 7目前的份额已经达到了23%。ZeroTurnaround称：目前Java 6是份额最多的Java版本，受访者中的88%使用的是这个版本，而有趣的是，有23%的受访者已经使用了Java SE 7（部分同时使用Java 6和7），考虑到Java 7发布还不到一年的时间，这样的速度颇让我们感到惊讶。
ZeroTurnaround的数据和Jelastic（一个Java应用托管云平台）之前的统计数据比较相近。下表显示的是Jelastic在去年12月份统计的数据。
Jelastic的数据是根据该平台上用户所设置的环境选项得出的，默认的选项为Java 6，用户也可以选择Java 7。
目前Java 7还未普及，甲骨文公司已经将Java 8、9、10列入了工作日程，据悉，Java 8正式版将于2013年9月份发布，Java 9、10也将在未来5年内发布，这些新版本的工作重点也将放在新特性和易用性上。
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MySQL: Essential Skills for Beginners to MasterApr 18, 2025 am 12:24 AMMySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.
MySQL: Structured Data and Relational DatabasesApr 18, 2025 am 12:22 AMMySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.
MySQL: Key Features and Capabilities ExplainedApr 18, 2025 am 12:17 AMMySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.
The Purpose of SQL: Interacting with MySQL DatabasesApr 18, 2025 am 12:12 AMSQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.
MySQL for Beginners: Getting Started with Database ManagementApr 18, 2025 am 12:10 AMThe basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA
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