A Partial Interface Implementation : Interface « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Interface

interface Conversions {
  double INCH_TO_MM = 25.4;

  double OUNCE_TO_GRAM = 28.349523125;

  double POUND_TO_GRAM = 453.5924;

  double HP_TO_WATT = 745.7;

  double WATT_TO_HP = 1.0 / HP_TO_WATT;

  public double inchesToMillimeters(double inches);

  public double ouncesToGrams(double ounces);

}

public abstract class MainClass implements Conversions {
  public double inchesToMillimeters(double inches) {
    return inches * INCH_TO_MM;
  }

  public double ouncesToGrams(double ounces) {
    return ounces * OUNCE_TO_GRAM;
  }

}