JDK is Java Devolop Kit - Java Development Kit
J2SDK is Java 2 Software Devolop Kit - Java2 Software Development Kit
In fact, JDK and J2SDK are basically the same.
J2SDK has several versions corresponding to java2
, J2EE needs to use the development tool is J2EESDK.
Only most of the application servers (WebLogic
JBoss, etc.) has built-in J2EESDK.
Of course, the J2SDK standard version is the foundation, so to install first; J2EESDK
Because it is an enterprise application, so you can download it after you can download it.
As for JRE, Java Runtime Envionment -
Java runs, JDK includes it, but for no development
The user can only install JRE separately, so Sun provides JRE.
Load.
JDK and J2SDK:
J2SDK contains Java Development Kit (JDK), Java Runtime Environment (JR
E) and Java Plug-in. The original Sun's Java software development kit is JDK
It is called J2SDK now.
JRE and PLUG-IN: JRE contains Java Plug-in.
J5SDK and JRE various versions are available separately on the Sun's Java website.
Download, J2SDK is provided to develop Java programs
Use, application users do not require development tools. And JRE as the name is JAV
A procedure to run the required environment
The so-called cross-platform is to have a middle agent, which is JRE.
. Generally, Java technology is developed
Software has to bring this, so Sun provides JRE installation files separately.
For use in Java applications.
Swing and JFC (Java Foundation Class) JFC is the early Sun to JDK's function extension
, Not Java public
Specification, Swing is one of the user interface extensions technology. The latest Java
2 The technology includes JFC technology, no need
It is necessary to extend again. To put it bluntly, it is actually Sun incorporating JFC into Java core.
Class library. JFC technology is originally used first,
The household must add JFC under the original JRE, now take a step.
Just JRE.
