Personally, the basic knowledge of various languages, such as identifiers, operators, etc. are almost the same macroscopically, but there will be a little difference in some aspects, because I already have the language foundation, so for identifiers, Keywords, operators, etc. will not be repeated, please understand, if you need to learn, you can search for information on the Internet and learn accordingly. If you have any questions, you can privately chat with me, and I will do my best to help friends who share the same interests as me.
As an initial JAVA novice, it is not recommended to use the integrated development environment eclipse directly. You should pay attention to the standardization of your own code and the ability to write your own code. Therefore, it is recommended to use Notepad and change the suffix to .java. Coding, rather than through eclipse's prompts or direct help to modify, is not conducive to our learning.
The following introduces the tools I use and the relevant download addresses:
Notepad (the system comes with, modify the suffix to .java)
Notepad++ (a good text editing tool, small and fast)
http://rj.baidu.com/soft/detail/13478.html?ald
JDK (java compilation environment (java SE), which contains the java runtime environment, specific knowledge about JDK can go to Baidu)
http://rj.baidu.com/soft/detail/14459.html?ald
Eclipse (JAVA Integrated Development Environment)
http://rj.baidu.com/soft/detail/41233.html?ald