Can we create an instance of an interface in Java

Question

Is it possible to create an instance of an interface in Java  Somewhere I have read that using inner anonymous class we can do it as shown below  interface Test       public void wish       class Main       public static void main String   args            Test t   new Test                 public void wish                     System out println  quot output  hello how r u quot                                     t wish             cmd gt  javac Main java cmd gt  java Main output  hello how r u  Is it correct here

User · Answer

Normaly  you can create a reference for an interface  But you cant create an instance for interface

User · Answer

You can never instantiate an interface in java   You can  however  refer to an object that implements an interface by the type of the interface   For example   public interface A     public class B implements A      public static void main String   args        A test   new B          A test   new A       wont compile     What you did above was create an Anonymous class that implements the interface   You are creating an Anonymous object  not an object of type interface Test

User · Answer

No in my opinion   you can create a reference variable of an interface but you can not create an instance of an interface just like an abstract class

User · Answer

Yes  your example is correct  Anonymous classes can implement interfaces  and that s the only time I can think of that you ll see a class implementing an interface without the  quot implements quot  keyword  Check out another code sample right here  interface ProgrammerInterview       public void read       class Website       ProgrammerInterview p   new ProgrammerInterview             public void read                 System out println  quot interface ProgrammerInterview class implementer quot                        This works fine  Was taken from this page  http   www programmerinterview com index php java-questions anonymous-class-interface

User · Answer

Yes it is correct  you can do it with an inner class

User · Answer

Short answer   yes  You can use an anonymous class when you initialize a variable  Take a look at this question  Anonymous vs named inner classes  - best practices

User · Answer

Yes we can   Anonymous classes enable you to make your code more concise  They enable you to declare and instantiate a class at the same time  They are like local classes except that they do not have a name -  Java Doc

[java] Can we create an instance of an interface in Java?

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