Java：如何在没有方法调用的情况下实现指针效果？

Question

I am trying to make some sort of integer (be it int or Integer ), x , that equals the sum of two other integers: a and b . a and b will change on occasion, so I want x to always be up-to-date.

Is there a way to do this without calling a getX() -like method that returns a + b ?

Answer 1

Well, yes, but it's no better than having a getter: the obvious alternative is to have setter methods for a and b that update x .

But I suspect that's not what you wanted.

There's no way to 'link' ints or Integers in Java without some kind of method call to update them.

Answer 2

不，没有办法。