Java – why doesn’t implicit conversion happen here?

I'm looking to convert a char array to a set of characters

Logically, if I write something like how to convert an array to a set in Java instead of using built-in functions, it will work But with built - in generic functions, it won't

Why not convert string arrays to characters?

As a follow - up answer (thanks btw) I want a simple example. I mean, why does the first line implicitly project, but the second line doesn't?

My understanding is that the role [] on the right hand side is indistinguishable

Solution

Because mystring Tochararray() will return a character [], which is not character [] You can verify it through this simple test: @ h_ 301_ 4@char [] a = { 'a' }; Character[] b = { 'b' }; a = b; // doesn't work,because char[] is not a Character[]

Character [] characterArray = {‘s’,’t’,’r’,’i’,’n’,’g’}; But it complies with collections Addall (...), because when the array is initialized, each value is automatically loaded from character to character