public static BooleanBinding notEqual (ObservableNumberValue op1, ObservableNumberValue op2, double epsilon)

Creates a new javafx.beans.binding.BooleanBinding that holds true if the values of two instances of javafx.beans.value.ObservableNumberValue are not equal (with a tolerance).

Two operands a and b are considered equal if Math.abs(a-b) <= epsilon.

Allowing a small tolerance is recommended when comparing floating-point numbers because of rounding-errors.

Parameters:
op1     the first operand
op2     the second operand
epsilon     the permitted tolerance

Returns:  the new BooleanBinding

Exceptions:
NullPointerException     if one of the operands is null