more and more
Introduction to PMD 1. Overview Simply put, PMD is a source code analyzer to find common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. It supports Java, JavaScript, Salesforce.com Apex, PLSQL, Apache Velocity, XML, XSL. In this article, we’ll focus on how to use… Continue Reading pmd
getdocs
Java Web Weekly, Issue 129 At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since. Here we go… 1. Spring and Java ===== >> Notes on Reactive Programming Part II: Writing Some Code… Continue Reading java-web-weekly-129
getdocs
Comprehensive Guide to Null Safety in Kotlin 1. Overview In this article, we’ll be looking at the null safety features built into the Kotlin language. Kotlin provides comprehensive, native handling of nullable fields – no additional libraries are needed. 2. Maven Dependency To get started, you’ll need to add the… Continue Reading kotlin-null-safety
getdocs
Java Weekly, Issue 288 Here we go… 1. Spring and Java ===== >> Hiding Services & Runtime Discovery with Spring Cloud Gateway [spring.io] A solid, ready-to-run example using Spring Cloud’s gateway and registry services. Good stuff. >> Exercises in Programming Style: maps are objects too [blog.frankel.ch] A functional solution to… Continue Reading java-weekly-288
getdocs
Configuring a Tomcat Connection Pool in Spring Boot 1. Overview Spring Boot is an opinionated – yet powerful – layer of abstraction placed on top of a plain Spring platform, which makes developing stand-alone and web applications a no-brainer. Spring Boot provides a few handy “starter” dependencies, aimed at running… Continue Reading spring-boot-tomcat-connection-pool
getdocs
The State of Java in 2018 I’ve been running the yearly “State of Java” survey for the last couple of weeks. It’s the 5th year of the survey and naturally the largest one yet, with 5160 developers taking the time to go through and answer. Let’s jump right into the… Continue Reading java-in-2018
getdocs
Install local jar with Maven Maven 1. The Problem and the options Maven is a very versatile tool and its available public repositories are second to none. However there will always be an artifact that is either not hosted anywhere, or the repository where it is hosted is risky to… Continue Reading install-local-jar-with-maven
getdocs
Cannot Reference “X” Before Supertype Constructor Has Been Called Java 1. Overview In this short tutorial, we’ll show how we can get the error Cannot reference “X” before supertype constructor has been called, and how to avoid it. 2. Constructors Chain A constructor can call exactly one other constructor. This… Continue Reading java-cannot-reference-x-before-supertype-constructor-error
getdocs
New Stream Collectors in Java 9 1. Overview Collectors were added in Java 8 which helped accumulate input elements into mutable containers such as Map, List, and Set. In this article, we’re going to explore two new collectors added in Java 9: Collectors.filtering and Collectors.flatMapping used in combination with Collectors.groupingBy… Continue Reading java9-stream-collectors
getdocs
Java Weekly, Issue 267 Here we go… 1. Spring and Java ===== >> The Complete Guide to the Java SE 12 Extended Switch Statement/Expression [infoq.com] A comprehensive write-up on the new syntax and semantics of the switch statement, plus updates regarding Project Amber and pattern-matching. >> JDK 9/JEP 280: String Concatenations Will… Continue Reading java-weekly-267
getdocs