Encapsulating Constants in a Program : Interface « Class Definition « Java Tutorial

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Java Tutorial » Class Definition » Interface

5. 29. 9. Encapsulating Constants in a Program


interface ConversionFactors {

  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 class MainClass {

  public static void main(String[] a) {

    System.out.println(ConversionFactors.INCH_TO_MM);

  }

}

25.4

5. 29. Interface
	5. 29. 1.	Interfaces and Abstract Classes
	5. 29. 2.	Fields and Methods in an Interface
	5. 29. 3.	To implement an interface: use the implements keyword after the class declaration
	5. 29. 4.	A Partial Interface Implementation
	5. 29. 5.	Extending Interfaces
	5. 29. 6.	Interfaces and Multiple Inheritance
	5. 29. 7.	Interfaces and Polymorphism: Using Multiple Interfaces
	5. 29. 8.	Nesting Classes in an Interface Definition
	5. 29. 9.	Encapsulating Constants in a Program
	5. 29. 10.	Multiple interfaces
	5. 29. 11.	Initializing interface fields with non-constant initializers

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