First, we need to know the differences between the terms:
J2se: standard desktop version
J2EE is the Enterprise Edition, and EE is the enterprise environment. Based on j2se, it adds extensions such as httpservelet/JSP/javamail.
The j2se version is the version of the mobile phone.
JDK: Java Development Kit, required by developers
JRE: javaruntimeenvironment if you only need to run JavaProgramOr applet, you only need to download this, if you want to develop it, you must download JDK.
Download eclipse in different periods. Various names will be found at startup. What is the version number:
Eclipse 3.2/Callisto, 3.3/Europa, 3.4/Ganymede, 3.5/Galileo, 3.6/Helios, 3.7/indigo, 3.8/4.2/Juno, 4.3/Kepler
Now, you can see which version to use. In Google, JDK and eclipse are input respectively. Currently, most of them are web development. Naturally, you need to find the EE ~