Note: In fact, the real learning a new language is not the first step in the installation of development tools, C # I turn JAVA, a little programming experience, so you can skip a few steps in front, directly on the IDE.
1. Download IntelliJ IDEA
[Official website]
http://www.jetbrains.com/idea/
It is recommended on a free instructional video for IntelliJ IDEA
https://www.imooc.com/learn/924
2. Download the JDK
You can go directly to the official website to download.
[Official website]
https://www.oracle.com/technetwork/java/javase/downloads/index.html
But when I download speed is very slow, only a few dozen K. So I'm not in the official website to download, here again recommend a high-speed download jdk site.
https://www.cr173.com/soft/79926.html
Into the page, scroll down, do not click on high-speed download, click on the red box inside ordinary download link on the line, speed is also full.
After JDK downloaded directly next next stop on the line. Open Intellij create a new project, you will be asked to select the JDK, select the JDK path just installed on the line.
Here, you can start knocking JAVA code it!