Eclipse IDE does not come with Scala support out of the box. You need to install the Scala IDE plugin to add Scala compatibility to Eclipse IDE. One complication is that the installed Scala IDE dictates which Scala releases would be used in Eclipse IDE. On some occasions, it takes the Scala IDE team some time to add support for the latest Scala version. After the installation, you can switch to Eclipse's new <Scala> perspective.
Scala IDE for the Eclipse plugin
Installing Scala IDE for Eclipse
While Scala IDE is available on the Eclipse Marketplace, its version is often not based on the last available version. Since the installed Scala IDE version dictates which Scala release will be supported, we recommend that...