Intellij, Android Studio, PyCharm, ...
Because it looks the best for a full IDE (editors are another topic 😉). Especially with Kotlin:

Das ist wirklich cool (Jepp mit pp?)

@Scrumplex Ist ja nur Umgangssprache 🤣.

Tell me more about this "kotlin"?

@AptFox It is this what TypeScript is for JS. And it has many modern features and seems similar to Swift.

DEPRECATED METHOD USED, WARNING, DOES NOT COMPUTE

@DRHAX34 Yea, I wanted to solve it fast and not find a better way for formatting in CharSequences.

@AptFox Modern JVM language, developed by JetBrains, the company behind IntelliJ, PHPStorm, PyCharm, etc.

@aritzh well I know that much. I was hoping to hear why people like it more than Java. What makes it cool?

@AptFox auto-casting after instanceof, by default all variables are non-nullable (you can explicitly allow it), very nice and short syntax-sugar, to be very productive, and easy two-way interoperability with Java, which makes it extremely easy to test it. You just take a Java project, add some functionality in Kotlin, and just call it from Java code.

I recommend you check their website, it is very descriptive

@aritzh the hero we need.