Java By Comparison

Group with New Lines

enum DistanceUnit {

    MILES, KILOMETERS;

    static final double MILE_IN_KILOMETERS = 1.60934;
    static final int IDENTITY = 1;
    static final double KILOMETER_IN_MILES = 1 / MILE_IN_KILOMETERS;

    double getConversionRate(DistanceUnit unit) {
        if (this == unit) {
            return IDENTITY;
        }
        if (this == MILES && unit == KILOMETERS) {
            return MILE_IN_KILOMETERS;
        } else {
            return KILOMETER_IN_MILES;
        }
    }
}

If blocks of code are pressed next to each other, you get the impression that they belong together. You can improve the readability of your code a lot if you separate distinct blocks with new lines.

The code here shows an enum that returns the conversion rate between miles and ...