Actually I agree for the Java world here. Thanks to the design of Java and many Java libraries you cannot write a little more complex Java code from your mind. Even importing all this nested OOP libraries is complicated without an IDE. For me Java is really a language which is impossible or too time consuming to master without a good IDE.

Working for many years in the python world professionally some people are still amazed that I'm essentially using more or less a normal text editor. IDE is optional for many languages but for some languages it's a strong requirement.