public class Converter {
    private static final double INCH_PER_METER = 39.37;
    private final double LBS_PER_KG = 2.2;
    
    public static class Distance {            // Nested Top-level class
        public double metersToInches(double meters) {
            return meters * INCH_PER_METER;
        }
    }// Metric

    public class Weight {                      // Member class
        public double kgsToPounds(double kg) {
            return kg * LBS_PER_KG;
        }
    }//Weight
}//Converter