While in Eclipse you normally have a set of projects that may depend on each other, in IntelliJ IDEA you have a single project that consists of a set of modules. This means that you can work with only one project at a time. The first thing you'll notice when launching IntelliJ IDEA is that it has no workspace concept. If you'd like to import your existing run configurations from Eclipse, consider using this third-party plugin.

For more information on how to import a project, refer to Import a project from Eclipse. If your project uses a build tool such as Maven or Gradle, we recommend selecting the associated build file pom.xml or adle when importing the project. When the Eclipse project is in the node, just click it to quickly open it in the IDE. This node will be available among the recent projects until you decide to remove it. IntelliJ IDEA automatically detects Eclipse projects located on your computer and places them in the dedicated node right on the Welcome screen.

To do this, click Open on the Welcome Screen or select File | Open in the main menu. You can import either an Eclipse workspace or a single Eclipse project. Import an Eclipse project to IntelliJ IDEA Switching from Eclipse to IntelliJ IDEA, especially if you've been using Eclipse for a long time, requires understanding some fundamental differences between the two IDEs, including their user interfaces, compilation methods, shortcuts, project configuration and other aspects.

Intellij key map vs eclipse