Java Resources

Resilience4j and Sentinel: Two Open-Source Alternatives to Netflix Hystrix

We take a look at a few open source alternatives to the now deprecated Hystrix microservices tool.

December 19, 2018

by Leona Zhang

· 20,722 Views · 10 Likes

How to Limit the Number of Concurrent Active User Sessions Using Spring Security

Use Spring Security to limit the number of concurrent user sessions in your Java apps.

December 19, 2018

by Javin Paul

· 37,364 Views · 8 Likes

Java Eclipse Code Refactoring Shortcuts and Tips

Time to get more productive when writing Java code using Eclipse!

December 18, 2018

by Ramesh Fadatare

· 50,148 Views · 23 Likes

How to Use Elasticsearch With a Spring Data Elasticsearch Project

If you're new to Elasticsearch or need a refresher, read on to learn how to integrate this popular open source searching tool into your application.

December 18, 2018

by Rajesh Bhojwani

· 103,921 Views · 6 Likes

Mixins Via Kotlin Delegation

Mixins can be handy in creating more readable, maintainable code.

December 18, 2018

by Steve Gertiser

· 34,309 Views · 7 Likes

Java 8 Streams API: Laziness and Performance Optimization

Learn more about the most important property of Java 8 Streams — laziness.

Updated December 17, 2018

by Amit Phaltankar

· 45,691 Views · 6 Likes

Generic Search in MongoDB With Java

There is no need to put a Service Class for every collection — one method could do that!

December 17, 2018

by Anis Hajri

· 19,082 Views · 2 Likes

Asymmetric JCE Cryptography API Using RSA Algorithm in Mule 4

See how to encrypt and decrypt stream, byte[], or string using the Asymmetric JCE Cryptography module in Mule 4 taking an API as the reference implementation.

December 17, 2018

by Sudeshna Mitra

· 20,706 Views · 4 Likes

Important Java Keywords That You Must Know

Check out the most important keywords in Java!

December 14, 2018

by Rinu Gour

· 19,104 Views · 9 Likes

Migrating Spring Boot Applications to the Latest Java Version (Java 11)

Need help migrating your Spring Boot apps over to Java 11?

December 13, 2018

by Akhil Raj

· 170,543 Views · 24 Likes

Spring Batch: Processing Data From Web Service to MongoDB

In this post, we will look at how to create a Spring Batch application that consumes web service data and insert it in the MongoDB database.

December 12, 2018

by Anis Hajri

· 28,212 Views · 4 Likes

JVM Calendar: JDPR or Java Data Protection Recommendations

After GDPR, we offer some additional thoughts on data protection within Java applications.

December 12, 2018

by Erik Costlow

· 11,004 Views · 3 Likes

Java Convert Map to Array [Snippet]

Check out this code example to learn more about converting to arrays.

December 10, 2018

by Ramesh Fadatare

· 21,491 Views · 8 Likes

The JDKs: Which One to Use?

Need help deciding which JDK is right for you? Look no further.

December 10, 2018

by Fernando Almeida

· 115,329 Views · 46 Likes

Installing Maven With Your JDK

Apache Maven remains one of the most popular dependency managers in the world of Java.

December 7, 2018

by John Thompson

· 94,591 Views · 11 Likes

How to Fix Invalid Target Release: 1.7, 1.8, 1.9, or 1.10 Error in Maven Build

Trying to build a Java project with Maven but your build keeps failing? Here's why.

December 7, 2018

by Javin Paul

· 182,717 Views · 7 Likes

WeakHashMap in Java With Class Example

Let's take a closer look at the WeakHashMap implementation in Java.

December 7, 2018

by Ramesh Fadatare

· 21,140 Views · 15 Likes

The Right Way to Reverse a String in Java

Learn the right way to reverse a String.

Updated December 6, 2018

by Jonatan Ivanov

· 46,877 Views · 26 Likes

All Hibernate Annotations: Mapping Annotations

If you make use of Hibernate, then this exhaustive reference of hibernate annotations will come in handy.

Updated December 6, 2018

by Ramesh Fadatare

· 71,241 Views · 7 Likes

Why I Never Null-Check Parameters

Writing code with input parameters that are not null is not "safer" — it's the opposite.

December 4, 2018

by Robert Brautigam

· 97,041 Views · 30 Likes

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