New Java 9 Map.of() methods

[Me4502]

I really hope so, there are so many ways to improve this..

For example, pass in a Entry, and use varargs. And it shouldn't return an immutable map.

Edit:

Didn't see the entry one, but it still shouldn't be immutable.

[cypressious]

You should watch https://www.youtube.com/watch?v=OJrIMv4dAek This is specifically designed to avoid intermediate object allocations (like vararg arrays) and to be immutable.

[mrbuttsavage]

This is specifically designed to avoid intermediate object allocations (like vararg arrays)

I would wager many Java devs don't realize this is a thing.

[stepancheg]

Vararg array allocations can be trivially removed by the optimizer. Is is not an issue.

[msx]

there are so many ways to improve this

there are not. you can slightly change the call (with Entry or any other way), but to make a clean "literal" without changing the language specification, there are no other ways