JAVA Functional interface and C # delegate correspondence relationship (I.)

C # Action Delegate VS JAVA action Interface function

1, C#:action

Encapsulates a method that does not have parameters and does not return a value.

Constructing entity class classes

1 usingSystem;2 3 namespaceactionsdelegate4 {5      Public className6     {7         Private stringinstancename;8 9          PublicName (stringname)Ten         { One              This. InstanceName =name; A         } -  -          Public voidDisplaytoconsole () the         { -Console.WriteLine ( This. InstanceName); -         }   -     } +}

1 usingSystem;2 3 namespaceactionsdelegate4 {5     class Program6     {7         Static voidMain (string[] args)8         {9Name name =NewName ("Jeff");TenAction action =name. Displaytoconsole; One action (); A Console.readkey (); -         }  -     } the}

Invoke the Action delegate

using System; namespace actionsdelegate{    class  program    {        staticvoid Main ( string [] args)        {            new Name ("Jeff");             = name. Displaytoconsole;            Action ();             Console.readkey ();      }}}

Execution result: output a Jeff string

2. JAVA:

Java does not have a standard action interface, and some articles say you can replace it with runnable, but Runnable is run on the thread, and we construct a Java interface function here

1 @FunctionalInterface 2  Public Interface Action {3     void  4     default  action Andthen (action after) {5         Objects.requirenonnull (after); 6         return (), {accept (); After.accept ();}; 7     }8 }

Constructing entity classes

1  Public className {2 3     PrivateString instancename;4 5      Publicname (String name) {6          This. InstanceName =name;7     }8 9      Public voidDisplaytoconsole () {TenSystem.out.println ( This. InstanceName); One     } A}

Call the Action interface function

1  Public  class  2public     staticvoid  main (String args[]) {3         name name=new name ("Jeff"); 4         Action action= (),name. Displaytoconsole (); 5      6} 7}         

Execution result: output a Jeff string

Summarize:

So the Java interface function is basically the same as the purpose that C # delegates achieve

JAVA Functional interface and C # delegate correspondence relationship (I.)