1. What is Functional Interface An interface with only one abstract method is called Functional Interface. Pre Java 8, there was no concept of Functional Interface. However, interfaces like Comparator and Runnable have only one abstract method. Hence they fell into the Functional Interface category in Java 8 unintentionally. 2. Example 2.1 getSellingPrice method snippet …
1. Intro In this guide, you will learn to handle the HTML Form using the Spring WebFlux Functional approach in Java. You will also learn a few important concepts related to HTML Form processing in Spring Webflux Functional. 2. Dependencies The following tools & libraries are used and tested for the given source code: Spring …
1. Intro Behavior parameterization is a technique to change the behavior of a function on demand. You may use it to implement the strategy design pattern. Strategy Design Pattern enables flexibility and control at the caller level by allowing selection of algorithm at the time of code execution. You will see the effectiveness of this …
In this tutorial, we will learn how to set up Apache Spark for local development and get started with Java applications. We will use an Apache log file to show a few basic RDD operations. Tools & Libraries used: Apache spark 2.1.1 Gradle (3.x) / Maven Eclipse IDE JDK 1.8 Mac OS X or Windows …
Big Data has come a long way. Apache spark is one of the fastest big data computational engines. We will answer often asked questions about the basics of Apache Spark in this article. What problems Apache Spark solves and how does it solve them? Big data computation problem When the size of data is large in terabytes, …
JSON (JavaScript Object Notation) is the most used structured data interchange format of the current generation. It is very common for REST clients to use it for data exchange. Several web client frameworks (e.g. AngularJS) natively handle JSON requests and responses. Jersey (JAX-RS) JSON support is very effective and easy to use. Usually, clients send and receive JSON …
Jersey (JAX-RS) JSON HTTP entity payload processing example Read More »
Jersey (JAX-RS) supports multiple files upload. A dynamic number of files can also be uploaded. In this tutorial we will solve the following problems: Upload more than one file. Upload dynamic numbers of files. Support to upload multiple files selected using input type file with multiple files selection enabled. E.g.<input type=”file” multiple />. 1. HTML form for …