Java interface, Lambda learning

1. implementation of the interface : use interface definition: The form is as follows          

1 Interface printable{2     Final int MAX = +; 3     void Add (); 4     float sum (floatfloat  y); 5 }

Interface interface Name {interface Body}, in which the interface body is only abstract methods and constants of the declaration, constants are public static type, methods are public type, the above interface printable can be expressed in the following form:

 1  interface       printable{ 2  public  final  static  int  max= 100 3  public   Abstract  void   add ();  4  public   Abstract  float  sum (float  X,float   y);  5 } 

To implement an interface with a class, the sample code is as follows:

1  Public Interfacecomputable{//Declaration Interface Computable2     intMAX = 46;3     intFintx);4 }5 6  Public classChinaImplementscomputable{//The China class implements the interface7     intNumber ;8      Public intFintx) {//overriding the interface F method public note9         intsum = 0;Ten          One          for(inti = 1; I <= x; i++){ Asum = sum +i; -         } -  the         returnsum; -      } - } -  +  Public classCalmaxImplementscomputable{ -     intNumber ; +      Public intFintx) { A         returnMAX +x; at     } -}

Java interface, Lambda learning