Helpful utility for transforming distance units from/to. - Inspired by java.util.concurrent.TimeUnit

DistanceUnit.java

package iam.bivas.commons.distance;

public enum DistanceUnit {
    FEETS {
        @Override
        public double toMeters(final double units) {
            return units / METER_TO_FEET;
        }

        @Override
        public double toKilometers(final double units) {
            return units / METER_TO_FEET / 1000.0;
        }

        @Override
        public double toFeets(final double units) {
            return units;
        }

        @Override
        public double toMiles(final double units) {
            return units / MILES_TO_FEET;
        }

        @Override
        public double convert(final double units, final DistanceUnit distanceUnit) {
            return distanceUnit.toFeets(units);
        }
    },
    METERS {
        @Override
        public double toFeets(final double units) {
            return units * METER_TO_FEET;
        }

        @Override
        public double toMeters(final double units) {
            return units;
        }

        @Override
        public double toKilometers(final double units) {
            return units / 1000.0;
        }

        @Override
        public double toMiles(final double units) {
            return units * METER_TO_MILE;
        }

        @Override
        public double convert(final double units, final DistanceUnit distanceUnit) {
            return distanceUnit.toMeters(units);
        }
    },
    KILOMETERS {
        @Override
        public double toFeets(final double units) {
            return units * 1000.0 * METER_TO_FEET;
        }

        @Override
        public double toMeters(final double units) {
            return units * 1000.0;
        }

        @Override
        public double toKilometers(final double units) {
            return units;
        }

        @Override
        public double toMiles(final double units) {
            return units * 1000.0 * METER_TO_MILE;
        }

        @Override
        public double convert(final double units, final DistanceUnit distanceUnit) {
            return distanceUnit.toKilometers(units);
        }
    },
    MILES {
        @Override
        public double toFeets(final double units) {
            return units * MILES_TO_FEET;
        }

        @Override
        public double toMeters(final double units) {
            return units / METER_TO_MILE;
        }

        @Override
        public double toKilometers(final double units) {
            return units / METER_TO_MILE / 1000.0;
        }

        @Override
        public double toMiles(final double units) {
            return units;
        }

        @Override
        public double convert(final double units, final DistanceUnit distanceUnit) {
            return distanceUnit.toMiles(units);
        }
    };

    private static double METER_TO_FEET = 3.2808399;
    private static double METER_TO_MILE = 0.000621371192;
    private static double MILES_TO_FEET = 5280.0;

    public double toFeets(final double units) {
        throw new AbstractMethodError();
    }

    public double toMeters(final double units) {
        throw new AbstractMethodError();
    }

    public double toKilometers(final double units) {
        throw new AbstractMethodError();
    }

    public double toMiles(final double units) {
        throw new AbstractMethodError();
    }

    public double convert(final double units, final DistanceUnit distanceUnit) {
        throw new AbstractMethodError();
    }
}

Hi @bivas. Very good idea, please beware that "feet" is already plural, therefore, "feets" is incorrect in english ;-)
See https://en.wikipedia.org/wiki/Foot_(unit)

You can create a PR and fix it Eliran Bivas

…

On Thu, Feb 13, 2020, 06:09 jlussagnet ***@***.***> wrote: Hi @bivas <https://github.com/bivas>. Very good idea, please beware that "feet" is already plural, therefore, "feets" is incorrect in english ;-) See https://en.wikipedia.org/wiki/Foot_(unit) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <https://gist.github.com/5023756?email_source=notifications&email_token=AAEBTQ3L4C7JVBIYQN3MF5LRCTBZNA5CNFSM4KUJVSA2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAGBZ3G#gistcomment-3175347>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAEBTQ5G65NGHNITAU7BRN3RCTBZNANCNFSM4KUJVSAQ> .