Java Resources

The Quickest Way to Create an Android QR Code Scanner

Learn the quickest way to create an Android QR code scanner. See a step-by-step implementation camera preview, as well as how to integrate QR code scanning SDK.

January 8, 2022

by Xiao Ling

· 5,134 Views · 2 Likes

Business Delegate Design Pattern in Java

Here, explore the Business Delegate Design Pattern in Java. This video tutorial includes an introduction, real-time example, implementation, and key points.

January 8, 2022

by Ram N

· 4,519 Views · 4 Likes

Protect Your Invariants!

This tutorial shows you how to handle constraints and validation inside your application. Read below to find out how this way can help you!

January 7, 2022

by Oresztesz Margaritisz

CORE

· 8,192 Views · 38 Likes

Composite Design Pattern in Java

Here, take a closer look at the Composite Design Pattern in Java. This video tutorial includes an introduction, class diagram, example, and key points.

January 6, 2022

by Ram N

· 4,911 Views · 5 Likes

JDBC Tutorial Part 1: Connecting to a Database

In this series, learn the basics of Java Database Connectivity. In Part 1, learn what a JDBC driver is and how to open and safely close database connections.

Updated January 6, 2022

by Alejandro Duarte

CORE

· 37,925 Views · 8 Likes

Debugging RAM - Part 1: Java Garbage Collection - Java Heap Deep Dive

Java memory usage is a complex beast, in this first installment, I discuss the available GCs in modern Java and how we can benchmark/tune them.

January 5, 2022

by Shai Almog

CORE

· 7,476 Views · 4 Likes

How We Handled the Log4j Security Vulnerability

Learn how we used Lattix Architect to find instances of log4j in their codebase and estimate how long it would take them to patch and test it.

January 5, 2022

by Sean Barow

· 4,540 Views · 3 Likes

Lazy Load Design Pattern in Java: An Introduction and Implementation

Watch the video in the article below on lazy load design patterns in Java including an introduction and how to implement it for yourself.

January 4, 2022

by Ram N

· 4,166 Views · 5 Likes

NullPointerException in Java: Causes and Ways to Avoid It

This article explains what NullPointerException is with its common causes and best practices you can do to avoid NPE. Read on to find out more!

Updated January 4, 2022

by Dmitry Egorov

CORE

· 26,222 Views · 18 Likes

Distributing a Java Command-Line Application

In this article, I'll show you how to package and distribute a java command-line application and the challenges one has to face to implement it.

January 4, 2022

by Loïc Rouchon

· 11,265 Views · 7 Likes

Filter or Criteria Design Pattern in Java: An Introduction, Example, and Key points

In the video below, we take a closer look at Filter or Criteria Design Pattern in Java with an introduction, example, and key points.

January 4, 2022

by Ram N

· 4,677 Views · 4 Likes

Log4J Does What?

Today, we'll see an example of how this vulnerability actually works. We'll cover Log4J library usage and see how basic inputs can cause potentially disastrous outcomes.

Updated January 3, 2022

by Barak Merimovich

· 18,971 Views · 26 Likes

Context Object Design Pattern in Java: Introduction and Key Points

This video tutorial introduces the concept of Java context object design pattern, including supplemental demonstrations and explanations.

January 3, 2022

by Ram N

· 5,391 Views · 4 Likes

The First Annual Recap From JPA Buddy

This article tells the history behind one of the most trending IntelliJ IDEA plugin - JPA Buddy. Also, it provides some insights about issues using JPA, Hibernate, Spring Data, etc.

January 1, 2022

by Aleksey Stukalov

· 7,124 Views · 6 Likes

Java: Object Pool Design Pattern

In this Java video tutorial, take a closer look at Object Pool Design Pattern. This tutorial includes an introduction, example, and key points.

December 31, 2021

by Ram N

· 6,259 Views · 3 Likes

Where To Use the Underscore in Java

In this post of our series “Stranger things in Java” - dedicated to Java insights, we will try to clarify the use of the underscore symbol "_" in Java programming.

December 29, 2021

by Claudio De Sio Cesari

· 6,467 Views · 8 Likes

Fighting Fragility With Property-Based Testing

In traditional unit testing, we set up our tests around edge cases. Jqwik validates against a whole range of possible inputs, making it better at catching regressions.

December 24, 2021

by Jasper Sprengers

· 5,627 Views · 1 Like