Friday, 15 January 2016

Java Tutorial : Java Nested Interface(Inside Interface)


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Java Tutorial : Java Nested Interface(Inside Interface)
OuterInterface.java
public interface OuterInterface
{
    void outerMethod();     
    
    public interface NestedInterface
    {
        void nestedMethod();
    }
}
MyClass.java
/*
 * As you can see in the below example, we are accessing the 
 * NestedInterface by its OuterInterface because 
 * it cannot be accessed directly. 
 * 
 * It is just like apple inside the box, we cannot access the apple directly 
 * because we must open the box first. 
 * 
 * In collection framework has provided a nested interface 
 * Entry. Entry is the sub-interface of Map i.e. accessed by Map.Entry.
 */

public class MyClass implements OuterInterface.NestedInterface
{

    @Override
    public void nestedMethod()
    {
        System.out.println("Nested Method has been called.");

    }

}
InterfaceTest.java
public class InterfaceTest
{

    public static void main(String[] args)
    {
        OuterInterface.NestedInterface nestedInterfaceRef = new MyClass();
        nestedInterfaceRef.nestedMethod();
    }

}
Output
Nested Method has been called.
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/InterfaceDemo-Nested-I-Interface-App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/InterfaceDemo-Nested-I-Interface-App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/fa67e02bcd9efeae1c2ea3019677c5252e4db5f7/BasicJava/InterfaceDemo-Nested-I-Interface-App/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
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