How to detect if a variable has changed?

Question

I have found myself wanting to do certain things in my programs only if a variable has changed. I have so far been doing something like this:

int x = 1;
in         


        

Answer 1

Since you want to find and perform some action only if the value changes, I would go with setXXX, for example:

public class X
{
    private int x = 1;

    //some other code here

    public void setX(int proposedValueForX)
    {
       if(proposedValueForX != x)
       {
           doOneTimeTaskIfVariableHasChanged();
           x = proposedValueForX;
       }
    }
}