Why does Java's List have “List.toArray()”, but arrays don't have “Array.toList()”?

  • A+
Category:Languages

Arrays don't have a "toList" function, so we need "Arrays.asList" helper functions to do the conversion.

This is quite odd: List has its own function to convert to an array, but arrays need some helper functions to convert to a List. Why not let arrays have a "toList" function, and what's the reason behind this Java design?

Thanks a lot.

 


Because List instances are an actual object, while arrays are (for MOST intents and purposes) a primitive and don’t expose methods. Although technically arrays are an object which is how they can have a field length and a method call such as clone(), but their classes are created after compilation by the JVM.

Comment

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen: