If I write an application I use Java as I am most comfortable with it. But it is not always the best choice. If I needed to write an application for windows with a GUI I would be more successful with C# as it would look more native. If I am writing a command line tool it would be a faster and smaller application if I build it in Go, Dart or Crystal. But then I would need to be good in it as well. I like seeing these…
I feel like the Dart syntax is very very close to Java!
If you like to experiment with a language that is similar to Java is suggest you try Vala. It looks a bit like Java but has some differences and uses ref counting instead of garbage collection. It compiles to C++ (or C?) and then to native; this makes the build extremely steep and difficult but once you get that going it is really nice.