Fields and Methods in an Interface : Interface « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Interface

1. Fields in an interface must be initialized and are implicitly public, static, and final.
2. You declare methods in an interface just as you would in a class.
3. Methods in an interface do not have a body.
4. All methods are implicitly public and abstract

interface Conversions{
  double inchesToMillimeters(double inches);

}