Concept confusion: jdk, j2sdk, j2eesdk, jre, and thoroughly dizzy
Source: Internet
Author: User
Concept confusion: jdk, j2sdk, j2eesdk, jre, and thoroughly dizzy-general Linux technology-Linux programming and kernel information. For details, see the following. Jdk is a java javaslop kit-java Development kit.
J2sdk is java 2 software Development lop kit -- java2 software development kit
In fact, jdk and j2sdk are basically the same.
Several j2sdk versions correspond to several versions of java2. The development tool J2eesdk is required for j2ee, but most application servers (such as weblogic jboss) have built-in j2eesdk.
Of course, j2sdk Standard Edition is the foundation, so you need to install it first; j2eesdk is an enterprise application, so it can be downloaded only after registration
Jre is a java runtime envionment -- java runtime Environment, which is included in jdk. However, users who do not need to develop but only run jre can install jre separately, therefore, sun provides the download of jre.
JDK and J2SDk:
J2SDk includes Java Development kit (JDK) and Java Runtime Environment (JR
E) and Java Plug-in. Sun's JAVA software development kit was JDK and is now called J2SDk.
JRE and plug-in: JRE contains java plug-in.
On sun's java website, various versions of J2SDK and JRE are provided for download. J2SDk is provided for JAVA program development.
Application users do not need development tools. As the name suggests, JRE is the environment required for JAVA programs to run.
The so-called cross-platform means that all platforms have an intermediate proxy, that is, JRE. Developed using JAVA Technology
So sun independently provides the JRE Installation File for JAVA application release.
Swing and JFC (Java Foundation Class) JFC were the early extensions of JDK functions by Sun, not the public
Standard. Swing is one of the user interface Extension Technologies. The latest JAVA2 technology includes JFC technology and does not need
It will be extended. To put it bluntly, Sun has incorporated JFC into the JAVA core class library. JFC technology was used in the past.
The user must add JFC under the original JRE. Now there is only one step less, and only JRE is needed.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.
