java – println(String s)vs println(Object o)

In my opinion, printstream Print (object x) and printstream Println (object x) and printstream Print (string x) and printstream Println (string x) is the same

Are there obvious reasons for both? Are they any different? Readability of API docs? Efficiency?

(using auto packing, I suspect that even printing methods with primitives as parameters are redundant... But these methods are earlier than the auto packing function, so they can be explained.)

Solution

They don't do the same thing:

Print (object x) calls string Valueof (x), return:

(obj == null) ? "null" : obj.toString();

So we have an extra toString () method

The result is the same because string Tostring() returns this However, in order to facilitate the use of API, users should not be forced to understand these details