more and more
Introduction to Functional Java 1. Overview In this tutorial, we’ll provide a quick overview of the Functional Java library along with a few examples. 2. The Functional Java Library The Functional Java library is an open source library meant to facilitate functional programming in Java. The library provides lots of basic… Continue Reading java-functional-library
getdocs
Creating REST Microservices with Javalin 1. Introduction Javalin is a lightweight web framework written for Java and Kotlin. It’s written on top of the Jetty web server, which makes it highly performant. Javalin is modeled closely off of koa.js, which means it’s written from the ground up to be simple… Continue Reading javalin-rest-microservices
getdocs
Counting Words in a String 1. Overview In this tutorial, we are going to go over different ways of counting words in a given string using Java. 2. Using StringTokenizer A simple way to count words in a string in Java is to use the StringTokenizer class: assertEquals(3, new StringTokenizer(“three… Continue Reading java-word-counting
getdocs
Ratpack Google Guice Integration 1. Overview In our earlier article, we’ve shown how building scalable applications using Ratpack looks like. In this tutorial, we will discuss further on how to use Google Guice with Ratpack as dependency management engine. 2. Why Google Guice? Google Guice is an open source software… Continue Reading ratpack-google-guice
getdocs
Java – Reader to InputStream In this quick tutorial we’re going to look at the conversion from a Reader to an InputStream – first with plain Java, then with Guava and finally with the Apache Commons IO library. This article is part of the “Java – Back to Basic” series… Continue Reading java-convert-reader-to-inputstream
getdocs
Guide to Java Parallel Collectors Library 1. Introduction Parallel-collectors is a small library that provides a set of Java Stream API collectors that enable parallel processing – while at the same time circumventing main deficiencies of standard Parallel Streams. 2. Maven Dependencies If we want to start using the library,… Continue Reading java-parallel-collectors
getdocs
Introduction to Micronaut Framework 1. What is Micronaut Micronaut is a JVM-based framework for building lightweight, modular applications. Developed by OCI, the same company that created Grails, Micronaut is the latest framework designed to make creating microservices quick and easy. While Micronaut contains some features that are similar to existing… Continue Reading micronaut
getdocs
Checking for Empty or Blank Strings in Java 1. Introduction In this tutorial, we’ll go through some ways of checking for empty or blank strings in Java. We’ve got some native language approaches as well as a couple of libraries. 2. Empty vs. Blank It’s, of course, pretty common to… Continue Reading java-blank-empty-strings
getdocs
Using AWS Lambda with API Gateway 1. Overview AWS Lambda is a serverless computing service provided by Amazon Web Services. In two previous articles, we discussed how to create an AWS Lambda function using Java, as well as how to access DynamoDB from a Lambda function. In this tutorial, we’ll… Continue Reading aws-lambda-api-gateway
getdocs
Bootstrapping JPA Programmatically in Java 1. Overview Most JPA-driven applications make heavy use of the “persistence.xml” file for getting a JPA implementation, such as Hibernate or OpenJPA. Our approach here provides a centralized mechanism for configuring one or more persistence units and the associated persistence contexts. And while this approach isn’t… Continue Reading java-bootstrap-jpa
getdocs