IntelliJ completion takes into account both type and name. For example, if you have two string variables, it will suggest the one that matches or is similar to

IntelliJ completion takes into account both type and name. For example, if you have two string variables, it will suggest the one that matches or is similar to the method parameter name. In general, IntelliJ has a lot of features that feel like magic (likely a pile of smart heuristics that have been added over the years).