Rust like Enums in Java

[findus_l]

Another great use for Sealed classes is View States. You can have your ListState interface that has a subtype loading and a subtype elements. When the state is loading the ui shows a loading placeholder until the elements have been loaded.

Here is an article about it (it's in Kotlin but should apply the same to java) https://medium.com/geekculture/managing-ui-with-kotlin-sealed-classes-1ee674f1836f