Extension Method of Java

In this blog we will learn non-abstract method implementations to interfaces by utilizing the “default" keyword. This feature is also known as Extension Methods.

Hello Friends

Here is the example

interface MyInterface {// Abstract Method
String enter(String name);
// Non-Abstract Method by using “default” Keyword
default String exit(String name) {
return “Hello ” + name +”, you are using exit method of MyInterface interface”;
}
}
public class MyClass{
public static void main(String[] args) {
// we are implementing MyInterface interface as an anonymous object
//and overridding abstract method
MyInterface f1 = new MyInterface() {
@Override
public String enter(String name) {
return “Hello ” + name +”, you are using enter method of MyInterface interface”;
}
};
// calling both abstract as well as non-abstract methods of interface
System.out.println(f1.enter(“Aman”));
System.out.println(f1.exit(“Aman”));
}
}

Output 

Hello Aman, you are using enter method of MyInterface interface
Hello Aman, you are using exit method of MyInterface interface