Null references have long been a notorious source of bugs and crashes in software development. Kotlin addresses this issue head-on with its robust null safety features. Unlike many other programming languages, where null references are the norm, Kotlin makes it clear when a variable can hold a null value and when it cannot. This clarity not only reduces the likelihood of null pointer exceptions but also improves code readability and maintainability.

IntelliJ is perfect! It''s ease to use,has an amazing code completion and plugins.

Ease of usability interface, I think it is very close to NetBeans.