Java Resources

How to use filter design pattern in Java—also known as Criteria Design Pattern, which is a structural pattern that combines multiple criteria to obtain single criteria.

October 22, 2020

by Brijesh Saxena

· 28,551 Views · 7 Likes

10 Examples of ConcurrentHashMap in Java

Below are some of the frequent operations around Java's ConcurrentHashMap, like how to create a ConcurrentHashMap, how to update a key or value.

Updated October 22, 2020

by Javin Paul

· 17,925 Views · 6 Likes

Using Flyweight Design Pattern In Java

In this article, explore the Flyweight design pattern in Java.

October 22, 2020

by Brijesh Saxena

· 8,644 Views · 6 Likes

How to Embed a jBPM Process in a Java EE Application

In this article, see a tutorial on how to embed a jBPM process in a Java EE application.

October 22, 2020

by Amit Nijhawan

· 7,564 Views · 2 Likes

Command Design Pattern In Java

Here, we'll discuss the Command Design Pattern — a useful pattern in which we wrap a request in an object known as Command and give it an Invoker to perform.

Updated October 22, 2020

by Brijesh Saxena

· 7,893 Views · 6 Likes

How to Convert a URL to PNG in Java

Our input will be the URL of the web page we want to capture, any extra loading wait, and the desired size parameters for your output.

October 21, 2020

by Brian O'Neill

CORE

· 5,453 Views · 1 Like

Spring Reactive Microservices: A Showcase

A road-map to developing Reactive Microservices in Spring. We combine material from various official and 3rd party sources and our personal experience.

Updated October 21, 2020

by Kyriakos Mandalas

CORE

· 23,151 Views · 16 Likes

Using Proxy Design Pattern In Java

Today, I will discuss another structural design pattern - Proxy Design Pattern. Proxy means an object functioning as another object.

October 20, 2020

by Brijesh Saxena

· 12,900 Views · 13 Likes

What's Wrong With Big Objects In Java?

The G1 garbage collector, despite its advantages, is currently not good at handling bigger objects, called Humongous. Learn how to diagnose and fix the problem.

October 20, 2020

by Misha Dmitriev

· 17,634 Views · 15 Likes

Minions in Minikube - A Kubernetes Intro for Java Developers

Java developers, it would be despicable not to take a look at this cute project that will give you a hands-on introduction to Kubernetes.

Updated October 20, 2020

by Ryan Dawson

· 16,191 Views · 20 Likes

Configuring Java Apps With Kubernetes ConfigMaps and Helm

This tutorial will show you how to develop Java microservices that use ConfigMaps, see how ConfigMaps are used, and update them in the app.

Updated October 20, 2020

by Ryan Dawson

· 84,506 Views · 19 Likes

Composite Design Pattern in Java

Want to learn more about the composite design pattern in Java? Take a look at this tutorial to learn how to implement this design pattern in your project.

Updated October 20, 2020

by Brijesh Saxena

· 64,217 Views · 19 Likes

How to Scan a Barcode Image in Java

Use an API to scan or look up a barcode. Supported barcode types include AZTEC, CODABAR, CODE_39, CODE_93, CODE_128, DATA_MATRIX, EAN_8, EAN_13, ITF, MAXICODE, PDF_417, QR_CODE, RSS_14, RSS_EXPANDED, UPC_A, UPC_E, All_1D, UPC_EAN_EXTENSION, MSI, PLESSEY, and IMB.

October 20, 2020

by Brian O'Neill

CORE

· 12,134 Views · 1 Like