One, download and install
1. Open the official website: http://www.jetbrains.com/idea/ , click "DOWNLOAD" in the page
2. Choose the downloaded IntelliJ IDEA version according to your needs, here my computer is Windows7 64 bit, I Choose Community (Community Edition)
3. Double-click the downloaded installation package
4. Click "Next"
5. Select the installation location, and then click "Next"
6. Check the installation selection, and then click "Next"
7. Click "Install" to enter the installation
8. The installation is complete, click "Finish"
2. Start
1. Double-click the installed desktop IntelliJ IDEA icon
2. Click "OK"
3. Check agree, and then click "Continue"
4. Select "Skip Remaining and Set Defaults"
Note: If you install the Ultimate version, you may need to crack the key