When does it make sense to use a public field?

Question

This is a question I have had for a while now:

When does it make sense to expose a field publicly like so?

public class SomeClass()
{
   public int backi         


        

Answer 1

I think it makes sense when you want to group some variables/objects (kind of like a C struct). For example:

class Pixel {
  public int x;
  public int y;
  Color c;
  // Other Pixel related information
}

As there are no methods, nothing breaks if a wrong value is used and it nicely puts these variables together.