Language Resources

MUnit JSON Assertion

Learn how to write MUnit tests to test JSON response payloads from a REST API in Mule, using a Groovy script, to avoid contract conflicts.

December 28, 2017

by Deepak Kushwaha

· 14,996 Views · 3 Likes

Kotlin: Functional Exception Handling With Try

Check out how you can introduce functional exception handling in Kotlin code with some help from the Try type as well as how to use lambdas for chaining.

December 28, 2017

by Biju Kunjummen

· 22,837 Views · 10 Likes

OOP Concepts for Beginners: What Is Polymorphism

Polymorphism can be an elusive concept to pin down, so let's take a look at what it is and what the different types are.

December 28, 2017

by Thorben Janssen

· 28,661 Views · 29 Likes

Creating a Simple Web App With Java 8, Spring Boot, and Angular

In this tutorial, we'll look at how developers can combine multiple technologies to make a web application. Read on to get started!

Updated December 27, 2017

by Ashish Lohia

CORE

· 392,455 Views · 39 Likes

IoC vs. DI

Some people use the terms Inversion of Control and Dependency Injection interchangeably. Let's see how they're different and how they can work together.

December 27, 2017

by Francisco Alvarez

CORE

· 141,003 Views · 106 Likes

Jackson Annotations for JSON (Part 4): General Annotations

In this final series post about Jackson annotations, let's look at some general use annotations that are handy to have at the ready.

December 26, 2017

by John Thompson

· 115,446 Views · 10 Likes

Connecting a PostgreSQL Database With Apache Camel

The jdbc: and sql: components in Apache Camel are similar, but vastly different. Let's see how you can use them to connect to a Postgres database.

December 26, 2017

by Jitendra Bafna

CORE

· 29,194 Views · 9 Likes

Random Number Generation in Java

Need some randomness in your numbers? Check out a few different techniques you can avail yourself of to create random (or mostly random) numbers in Java.

December 26, 2017

by John Thompson

· 1,267,705 Views · 31 Likes

Migration of Legacy DB/File Structure to RDBMS

Migration is difficult, but sometimes, it's required — like if you want to improve your database's performance or utilize features of the target RDBMS that are missing in the source.

December 25, 2017

by Krishna Anumarlapudi

· 9,086 Views · 8 Likes

Jackson Annotations for JSON (Part 3): Deserialization

As we continue our journey through Jackson annotations, let's see what you can use to help control deserialization of JSON into POJOs.

Updated December 25, 2017

by John Thompson

· 162,248 Views · 10 Likes

Accessing Git Repos With Java Using SSH Keys

See how you can use SSH keys to gain access to Git repos from Java apps. We'll use JGit and cover some customizations you can introduce.

December 25, 2017

by Sebastian Daschner

· 28,913 Views · 8 Likes

Kotlin DSL: From Theory to Practice

Kotlin's DSL properties are legendary, so let's walk through each of the important tools available in your kit and see how to put them to use.

December 24, 2017

by Ivan Osipov

· 34,722 Views · 20 Likes

Multi-Release JARs: Good or Bad Idea?

The folks at Gradle feel that Java 9's multi-release JARs are a poor solution to a real problem for library designers. See how to create an MRJAR and why you shouldn't.

December 23, 2017

by Cédric Champeau

· 19,731 Views · 16 Likes

Too Many PreparedStatement Placeholders in Oracle JDBC

In this post, we discuss a particular error related to JDBC making calls out to an Oracle database. Read on for the details.

December 22, 2017

by Dustin Marx

· 17,406 Views · 2 Likes

Kotlin vs. Scala (vs. Java)

Java might be the grandaddy of them all, but there are new kids on the block. Let's see what makes Scala and Kotlin great, frustrating, and how they compare to Java.

December 22, 2017

by Nyma Malik

· 126,670 Views · 47 Likes

A Guide for Customer Retention Analysis With SQL

See how to make basic customer retention analysis, build customer retention over time, deal with new vs. existing customers retention curves, and calculate retention analysis in cohorts.

December 22, 2017

by Luba Belokon

· 27,145 Views · 4 Likes

A Deep Dive Into the Java ExecutorService

Take a dive into Java's ExecutorService to see how you can put it to use, including overviews of the various parameters at your disposal.

December 22, 2017

by Tim Ojo

· 176,832 Views · 33 Likes

Implicit vs. Explicit Cursor: Which Should You Use?

"Hmmm," you might be saying to yourself, "a conversation about SQL queries in a post on conditional logic? That's strange." Ah, but maybe not so strange.

December 20, 2017

by Steven Feuerstein

· 7,635 Views · 2 Likes