|
JDK 是整个Java的核心,包括了Java运行环境(Java Runtime Envirnment),一堆Java工具和Java基础的类库(rt.jar)。不论什么Java应用服务器实质都是内置了某个版本的JDK。因此掌握 JDK是学好Java的第一步。最主流的JDK是Sun公司发布的JDK,除了Sun之外,还有很多公司和组织都开发了自己的JDK,例如IBM公司开发的JDK,BEA公司的Jrocket,还有GNU组织开发的JDK等等。其中IBM的JDK包含的JVM(Java Virtual Machine)运行效率要比Sun JDK包含的JVM高出许多。而专门运行在x86平台的Jrocket在服务端运行效率也要比Sun JDK好很多。但不管怎么说,我们还是需要先把Sun JDK掌握好。
Java Platform, Standard Edition (Java SE, formerly known as J2SE) offers a complete environment for application development and deployment on desktops and servers. Java SE is also at home in today's demanding Embedded and Real-Time environments. Java SE includes classes that support the development of Java Web Services and provides the foundation for Java Platform, Enterprise Edition (Java EE).
下载地址: ·Java SE Development Kit (JDK) 6 ·Java SE Development Kit (JDK) 6 and NetBeans IDE 5.5 Final Release ·Java SE Development Kit (JDK) 6 with Java EE ·Java Runtime Environment (JRE) 6
|