Java is a programming language and computing platform first released by Sun Microsystems in 1995. It is the underlying technology that powers state-of-the-art programs including utilities, games, and business applications. The most important feature of Java is its byte code that can be interpreted on any platform including windows, Linux etc. Java runs on more than 850 million personal computers worldwide, and on billions of devices worldwide, including mobile and TV devices. Java is platform independent. So it can work in any Operating System like windows, Linux, Mac.
J2EE is not a single language. It supports many frameworks like struts, jsf, and spring, hibernate. It is open source. Even the IDE (Integrated Development Environment) like Eclipse, Net beans, are free. Application servers are also free like Tomcat, jboss. Databases like Mysql, PostgreSQL which are commonly used in J2ee are free too. So the development cost is cheap. Just need personal computer and a programmer. APIs used in J2EE are well documented. Several APIs are used to implement low level details of enterprise applications. Since those APIs are already written and well documented, this will save you a lot of time. J2ee is used to write powerful and efficient applications for mobile phones, remote processors, low-cost consumer products, and view images in 3D, to play online games, chat with people around the world, The enterprise form of Java, which is known as J2EE (Java 2 Enterprise Edition), is the most famous Java architecture in use in modern scenario. J2EE is a combination of many technologies bundled together to form a pack, which offers everything that is required to develop an enterprise application. It comes with features like flexibility, scalability, object orientation, security, persistence, caching, performance tuning and many more.
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