Java8 - Lambda Expressions - Example 1

Hello Friends 

As the Java 8 SDK released during mid of March - I started exploring the Java 8 and it's one of the major updates to the core i.e. Lambda Expressions which is the hot topic/trend in the Java. 

Here first of all I am explaining a simple Lambda Expression - Hello World Program .. But the in detail will soon publish a pdf file along with all the changes and my understandings in a document. 

Step 1: 

Create a Functional Interface using @FunctionalInterface annotation tag which got introduced in Java 8 

@FunctionalInterface
public interface WorkerInterface {
     public void doSomeWork();
 }

Step 2: 

In the general class implement the above interface or no need of implement also. 

public class CustomizedLambdaExample {

 

    public static void callMethod(ExampleFunctionInterface funcInt) {

        funcInt.methodOne();

    }

    public static void main(String [] args) {

         //using Annonymous class - Prior to Java8

        callMethod(new ExampleFunctionInterface() {

            @Override

            public void methodOne() {

                System.out.println("methodOne called, using Anonymous class");

            }

        });

     

        //using Lambda expression - Using Java8 Lambda 

        callMethod( () -> System.out.println("Hello World") );

    }

}

STAY TUNE FOR THE COMPLETE REFERENCE FOR JAVA 8 and LAMBDA EXPRESSIONS

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