Java Interface Example

  interface IntExample{

      //Syntax-<modifier> <return-type> methodName(<optional-parameters>);

    // Methods declared in the interface are implicitly public and abstract.

 
 public void sayHello();

    }

  }

  /*

  Classes are extended while interfaces are implemented.

  To implement an interface use implements keyword.

  IMPORTANT : A class can extend only one other class, while it

  can implement n number of interfaces.

  */

   

  public class JavaInterfaceExample implements IntExample{

   

    public void sayHello(){

      System.out.println("Hello Visitor !");

    }

  

    public static void main(String args[]){

      //create object of the class

      JavaInterfaceExample javaInterfaceExample = new JavaInterfaceExample();

      //invoke sayHello(), declared in IntExample interface.

      javaInterfaceExample.sayHello();

    }

  }

   

    OUTPUT

  Hello Visitor !