An instance field, or field, is a variable that's bound to the object itself.
I can use it in the object without the need to use accessors, and any method
contained within the object may use it.
If I wanted to use it outside of the object, and it was not public, I would
have to use getters and/or setters.
public class Point {
private int xValue; // xValue is a field
public void showX() {
System.out.println("X is: " + xValue);
}
}