OCJP Exam watch tip #15


Prior to Java 8, as Java programmers we are used to writing anonymous inner classes. Let us see an example of writing equivalent Lambda fucntion for the below anonymous class


interface Function {
   void call();
class AnonymousInnerClass {
    public static void main(String []args) {
        Function function = new Function() {
            public void call() {
                System.out.println(“Hello world”);



interface LambdaFunction {
    void call();
class EquivalentLambda{
    public static void main(String []args) {
        LambdaFunction lambdaFunction = () -> System.out.println(“Hello world”);

Go through this article for further reading on Java 8: Lambda Functions – Usage & Examples


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