

IntelliJ IDEA is a cross-platform development tool that supports Windows, Mac, Linux and other operating systems. Go to the IDEA official download page (the official website address is ), click DOWNLOAD.

Now let’s download and install the IDEA, the steps are as follows. The free Community version only supports a few languages such as Java and basic IDE features, while full-featured commercial version also supports multiple programming like HTML, CSS, PHP, MySQL, Python and Go. IntelliJ IDEA offers a free Community Edition and a paid Ultimate Edition. It has good applications in intelligent code assistants, automatic code prompts, refactoring, J2EE support, various version tools (Git, SVN, etc.), JUnit, CVS integration, code analysis, innovative GUI design, etc. Click Continue to start using it.IntelliJ IDEA, was developed by JetBrains and is an integrated environment for Java programming language development, with many features such as maintainable code and High Performance. You've copied and pasted the whole code.You're using the code for your IDE version.If the code field is highlighted red and the Activate button is unavailable, make sure that: Drag and drop the file with the activation code into the dialog or copy the code and paste it into the corresponding field.In the Get license from section, select Activation code. If the activation dialog doesn't appear straight away, go to Help | Register and click Activate New License.

Pick the one that corresponds to the version you're using. The file names indicate the IDE version that the code inside is intended for. You'll find two text files inside, each containing an activation code.Go to your Downloads folder and unzip the archive. This will save a ZIP archive to your computer.In the license list, find the license you want to activate and click Download activation code for offline usage.If you don't have an account yet, see this article to learn how to create one. To activate these, you need to use your JetBrains Account.

Offline activation codes are not available for free student and teacher licenses. If you can't connect to the internet to activate your IDE, use an offline activation code. However, it requires an internet connection. Using your JetBrains Account is the fastest and easiest way to activate JetBrains software.
