减少代码：“ VoteService类型中的方法changeVote不适用于参数（无效）”

Question

I am kind of new to Java and am trying to cut down unneccessary lines of code. I am getting an error, and belive I was able to do this in c# or c++: I wish to bind the following 2 lines of code in one:

checkVote.setType(null);                
changeVote(checkVote);
//into
changeVote(checkVote.setType(null));

I get the error from the title. I know why it occurs (the setter return type is void, and there is no changeVote(void) method). But I still feel like there are ways of doing what I want.

Answer 1

You can change the method setType to return this instead of void . This would violate the JavaBean convention, but it could be suitable for your use case.

This approach is used in the builder pattern

Answer 2

method changeVote possibly takes only checkVote as parameter and you are trying to pass a paramter which is returnig void. In fact this is not even possible in C++.

So those 2 lines continue to be same.