IntelliJ IDEA
IntelliJ IDEA – the Leading Java and Kotlin IDE, by JetBrains
Features
Native File Associations in Maia
In Maia, it’s finally possible to open a file in associated application (for example, .doc or .pdf) by double-clicking it in Project View or by pressing F4. This works for file types, registered under Files opened in associated applications.
The dialog displayed after you double-click a file of an unknown type also gives you options to associate its type with an application:
Also, Project View and Open File dialogs now display file type icons as they are registered in your OS, instead of generic unknown file icon.