=+确实是= +(赋值和一元+运算符).

=+ is really = + (assignment and the unary + operators).

为了帮助您记住+=，请记住它先进行加法运算，然后进行赋值运算.当然，这取决于实际的实现，但是应该用于原语.

In order to help you remember +=, remember that it does addition first, then assignment. Of course that depends on the actual implementation, but it should be for the primitives.