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The Latest Java Topics

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What's Wrong With Hashcode in java.lang.String?
This overview of strings and hashcode covers how hashcode works, how collisions happen, and the danger of improperly using strings as keys.
June 6, 2017
by Artem Rukavytsia
· 59,626 Views · 35 Likes
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Simple Attribute-Based Access Control With Spring Security
Have you ever worked on software where the access rules are based not only on user's role but also on the specific entity that role was granted? You will probably find Attribute-Based Access Control very useful — this article will tell you how.
Updated June 5, 2017
by Mostafa Eltaher
· 130,067 Views · 45 Likes
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5 Java Performance Optimization Tricks
Some Java performance optimization tricks include starting with minimum heap allocation, using a StringBuilder instead of the + operator, and avoiding Iterator.
June 4, 2017
by Joydeep Bhattacharya DZone Core CORE
· 55,191 Views · 3 Likes
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Parsing in Java (Part 1): Structures, Trees, and Rules
In Part 1 in this comprehensive series on parsers (with a focus on Java), we examine how parsers work, the difference between Parse Trees and ASTs, and more.
Updated June 4, 2017
by Gabriele Tomassetti
· 46,936 Views · 52 Likes
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Creating Microservices on the Pivotal Platform
Using the Pivotal platform gives you an easy way to deploy, scale, and monitor your microservices. Learn how to get it set up and running.
June 2, 2017
by Piotr Mińkowski
· 26,608 Views · 9 Likes
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Concurrency in Action: Using Java's CompletableFuture With Work Manager
Learn how to create nonblocking code in Java EE by using the Java functions, CompletableFuture and Work Manager. Read on for more!
May 31, 2017
by Nikhil Bhide
· 76,910 Views · 11 Likes
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Converting JSON to POJOs Using Java
If you find yourself mapping JSON to POJOs but don't want to write a full class, help yourself to a handy library that does the work for you.
May 30, 2017
by Anurag Jain
· 267,476 Views · 55 Likes
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What Does Spring DelegatingFilterProxy Do?
You might see Spring's DelegatingFilterProxy crop up sometimes. It's actually a proxy for a standard Servlet Filter. Let's see an example in action with Spring Security.
May 30, 2017
by Martin Farrell
· 35,254 Views · 9 Likes
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All About VisualVM
VisualVM is one of those indispensable tools for Java (and JVM-based) developers. An oft-unsung hero, this post tells you what it is, how to set it up, and its benefits.
May 30, 2017
by Angela Stringfellow
· 37,931 Views · 26 Likes
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Introducing a Parameterized Test Suite for JUnit 4
As JUnit 4 fans will know, you aren't able to parameterize test suites. But now there's an extension, via the Runner class, that will help you out.
May 29, 2017
by Peter Wippermann
· 20,130 Views · 2 Likes
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7 Reasons to Consider JUnit 5
JUnit 5 will be out soon! With the new Jupiter API, a focus on extensibility, and a huge integration overhaul, it promises to make testing easier than ever.
May 29, 2017
by Daniel Olszewski
· 25,989 Views · 14 Likes
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Java 8 Concepts: FP, Streams, and Lambda Expressions
This technical overview of Java 8 covers its functional aspects, including translations to the imperative paradigms, and how streams and lambdas work.
May 28, 2017
by Radek Krawiec
· 92,188 Views · 69 Likes
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Java 9 (Part 4): Trying Try-with-Resources: First Look
In Part 4 of this Java 9 series, we see that try-with-resources has been enhanced. Let's compare how Try With Resources worked back in Java 7 versus today.
Updated May 27, 2017
by Tomer Ben David
· 22,017 Views · 8 Likes
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JPA Auditing: Automatically Persisting Audit Logs Using EntityListeners
When creating audit logs, consider using Spring Data. Its JPA functionality allows for EntityListeners and callback methods to update the needed properties.
May 27, 2017
by Naresh Joshi
· 76,096 Views · 21 Likes
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Multi-Stage Docker Image Build for Java Apps
No longer do you have to manage multiple Dockerfiles and use the Builder Pattern. Now, you can save time by creating a multi-stage build process for your Java apps.
May 26, 2017
by Shekhar Gulati
· 37,821 Views · 3 Likes
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OkHttpClient Logging Configuration With Interceptors
Debugging HTTP can be complicated, but setting up the proper logging will enable you to track down issues much more quickly.
May 26, 2017
by Bill O'Neil
· 20,109 Views · 4 Likes
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Java Profilers: 3 Different Types and Why You Need All of Them
Should you use standard profilers, lightweight options, or APM tools? The answer is all three. Each one has its strengths and weaknesses, detailed here.
May 26, 2017
by Darin Howard
· 15,979 Views · 3 Likes
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Spring Data JPA Auditing: Automatically Saving the Good Stuff
Auditing provides valuable information, but it can be a nightmare to implement. Fortunately, through Spring Data JPA, you can persist the columns you need.
May 24, 2017
by Naresh Joshi
· 150,387 Views · 28 Likes
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JPA Caching With Hazelcast, Hibernate, and Spring Boot
In-memory data grids are often used to enhance performance. Learn how to use Hazelcast for caching data stored in the MySQL database accessed by Spring Data DAO objects.
May 24, 2017
by Piotr Mińkowski
· 36,853 Views · 9 Likes
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A Short History of Java
It's Java's 22nd birthday! Let's look back in time at how the world's most popular language formed and how Java got to be the juggernaut it is today.
May 23, 2017
by Jamie Mercer
· 51,091 Views · 42 Likes
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