IntelliJ IDEA
IntelliJ IDEA – the Leading Java and Kotlin IDE, by JetBrains
Features
Code Foldings for I18n Support
As you may know, IntelliJ IDEA 8 includes the complete i18nization support. In IntelliJ IDEA 9 (Maia) it will be improved with special i18n foldings that would allow to hide method calls, retrieving properties from resource bundles and replace them with actual property values.
If properties contain any parameters, they will be automatically evaluated before displaying.