public void validateMinimum() {
        double newMin;
        try {
            newMin = Double.parseDouble(this.minimumRangeValue.getText());
            if (newMin >= this.maximumValue) {
                newMin = this.minimumValue;
            }
        }
        catch (NumberFormatException e) {
            newMin = this.minimumValue;
        }

        this.minimumValue = newMin;
        this.minimumRangeValue.setText(Double.toString(this.minimumValue));