eBook – Guide Spring Cloud – NPI EA (cat=Spring Cloud)
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Let's get started with a Microservice Architecture with Spring Cloud:

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eBook – Mockito – NPI EA (tag = Mockito)
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Mocking is an essential part of unit testing, and the Mockito library makes it easy to write clean and intuitive unit tests for your Java code.

Get started with mocking and improve your application tests using our Mockito guide:

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eBook – Java Concurrency – NPI EA (cat=Java Concurrency)
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Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.

Get started with understanding multi-threaded applications with our Java Concurrency guide:

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eBook – Reactive – NPI EA (cat=Reactive)
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Spring 5 added support for reactive programming with the Spring WebFlux module, which has been improved upon ever since. Get started with the Reactor project basics and reactive programming in Spring Boot:

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eBook – Java Streams – NPI EA (cat=Java Streams)
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Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.

But these can also be overused and fall into some common pitfalls.

To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:

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eBook – Jackson – NPI EA (cat=Jackson)
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Do JSON right with Jackson

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eBook – HTTP Client – NPI EA (cat=Http Client-Side)
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Get the most out of the Apache HTTP Client

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eBook – Maven – NPI EA (cat = Maven)
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Get Started with Apache Maven:

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eBook – Persistence – NPI EA (cat=Persistence)
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Working on getting your persistence layer right with Spring?

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eBook – RwS – NPI EA (cat=Spring MVC)
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Building a REST API with Spring?

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Course – LS – NPI EA (cat=Jackson)
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Get started with Spring and Spring Boot, through the Learn Spring course:

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Course – RWSB – NPI EA (cat=REST)
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Explore Spring Boot 3 and Spring 6 in-depth through building a full REST API with the framework:

>> The New “REST With Spring Boot”

Course – LSS – NPI EA (cat=Spring Security)
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Yes, Spring Security can be complex, from the more advanced functionality within the Core to the deep OAuth support in the framework.

I built the security material as two full courses - Core and OAuth, to get practical with these more complex scenarios. We explore when and how to use each feature and code through it on the backing project.

You can explore the course here:

>> Learn Spring Security

Course – LSD – NPI EA (tag=Spring Data JPA)
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Spring Data JPA is a great way to handle the complexity of JPA with the powerful simplicity of Spring Boot.

Get started with Spring Data JPA through the guided reference course:

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Partner – Moderne – NPI EA (cat=Spring Boot)
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Refactor Java code safely — and automatically — with OpenRewrite.

Refactoring big codebases by hand is slow, risky, and easy to put off. That’s where OpenRewrite comes in. The open-source framework for large-scale, automated code transformations helps teams modernize safely and consistently.

Each month, the creators and maintainers of OpenRewrite at Moderne run live, hands-on training sessions — one for newcomers and one for experienced users. You’ll see how recipes work, how to apply them across projects, and how to modernize code with confidence.

Join the next session, bring your questions, and learn how to automate the kind of work that usually eats your sprint time.

Course – LJB – NPI EA (cat = Core Java)
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Code your way through and build up a solid, practical foundation of Java:

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Partner – LambdaTest – NPI EA (cat= Testing)
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Distributed systems often come with complex challenges such as service-to-service communication, state management, asynchronous messaging, security, and more.

Dapr (Distributed Application Runtime) provides a set of APIs and building blocks to address these challenges, abstracting away infrastructure so we can focus on business logic.

In this tutorial, we'll focus on Dapr's pub/sub API for message brokering. Using its Spring Boot integration, we'll simplify the creation of a loosely coupled, portable, and easily testable pub/sub messaging system:

>> Flexible Pub/Sub Messaging With Spring Boot and Dapr

1. Overview

In our introduction to FindBugs, we looked at the functionality of FindBugs as a static analysis tool and how it can be directly integrated into IDEs like Eclipse and IntelliJ Idea.

In this article, we’re going look into few of the alternative static analysis tools for Java – and how these integrate with Eclipse and IntelliJ IDEA.

2. PMD

Let’s start with PMD.

This mature and quite well-established tool analyzes source code for possible bugs, suboptimal codes and other bad practices; it also looks at more advanced metrics such as cyclomatic complexity for the codebase it analyzes.

2.1. Integration With Eclipse

The PMD plugin can be directly installed from Eclipse Marketplace. The plugin can also be manually downloaded here as well. Once installed, we can run the PMD check directly from the IDE itself:

pmd eclipse run

It’s worth noting we can run PMD at the project level or at individual class level.

The results are shown below – with different colors for different levels of the finding which ranges from “warning” to “blocker” in the increasing order of severity:

pmd eclipse result

We can dig into the details of each entry by right clicking it and selecting “show details” from the context menu. Eclipse will display a brief description of the issue and possible remediation how to solve it:

pmd eclipse options pmd eclipse details

It’s also possible to change the configuration of the PMD scan – we can do that in the menu, under Window -> Preferences -> PMD to launch the configuration page. Here, we can configure scan parameters, rule set, result display settings, etc.

If we need to deactivate some specific rules for the project – we can simply remove them from the scan:

pmd eclipse config

2.2. Integration With IntelliJ

Of course, IntelliJ has a similar PMD plugin – which can be downloaded and installed from the JetBrains plugin store.

We can similarly run the plugin right in the IDE – by right-clicking the source we need to scan and selecting PMD scan from the context menu:

run pmd

Results are displayed immediately but, unlike in Eclipse, if we try to open the description it will open up a browser with a public web page on finding information:

pmd results

We can set the behavior of the PMD plugin from the settings page, by going to File -> Settings -> other settings -> PMD to view configuration page. From the settings page, we can configure the rule set by loading a custom rule set with our own testing rules.

3. JaCoCo

Moving on – JaCoCo is a test coverage tool – used to keep track of unit test coverage in the codebase. Simply put, the tool calculates the coverage using a number of strategies e.g.: lines, class, methods, etc.

3.1. Integration With Eclipse

JaCoCo can be directly installed from the marketplace. An install link is also hosted on the official site available here.

jacoco eclipse run

The tool can be executed from project level to individual method level. The Eclipse plugin uses different color schemes to pinpoint what portion of the code is covered by the test cases and what is not covered:

jacoco eclise coverage

Our method is dividing two provided integer parameters and return the result. If the second parameter is zero it will return a max value for the integer data type.

In our test case, we’re only testing out the scenario where the second parameter is zero:

jacoco eclise coverage test

In this case, we can see that line 6 is colored in yellow. Only one branch of the ‘if’ condition is tested and runs in our simple test. Therefore it’s not completely tested and marked in yellow.

Furthermore, line 7 has green color – it means that it is fully tested. Finally, line 9 is highlighted with a red color, which means that this line is not tested at all by our unit tests.

We can see a summary of the test coverage where it displays how much code is covered under unit tests in class level and package levels:

jacoco eclise coverage summary

3.2. Integration With IntelliJ IDEA

JaCoCo is bundled by default with the latest IntelliJ IDEA distribution, so there’s no requirement to install the plugin separately.

When executing unit tests, we can select what coverage runner we need to use. We can run the test cases either at the project level or at the class level:

run tests with coverage

Similar to Eclipse, JaCoCo displays results using different color schemes for the coverage.

coverage code highlights

We can see the summary of the test coverage where it displays how much of the code is covered under unit tests in class level and package levels.

coverage results

4. Cobertura

Finally, it’s worth mentioning Cobertura – this is similarly used to keep track of unit test coverage in the codebase.

The latest version of Eclipse doesn’t support the Cobertura plugin at the time of writing; the plugin does work with earlier Eclipse versions.

Similarly, IntelliJ IDEA doesn’t have an official plugin which can execute the Cobertura coverage.

5. Conclusion

We looked at integration with Eclipse and IntelliJ IDEA for three widely used static analysis tools. FindBug was covered in a previous introduction to FindBugs.

The code backing this article is available on GitHub. Once you're logged in as a Baeldung Pro Member, start learning and coding on the project.
Baeldung Pro – NPI EA (cat = Baeldung)
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Baeldung Pro comes with both absolutely No-Ads as well as finally with Dark Mode, for a clean learning experience:

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Once the early-adopter seats are all used, the price will go up and stay at $33/year.

eBook – HTTP Client – NPI EA (cat=HTTP Client-Side)
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The Apache HTTP Client is a very robust library, suitable for both simple and advanced use cases when testing HTTP endpoints. Check out our guide covering basic request and response handling, as well as security, cookies, timeouts, and more:

>> Download the eBook

eBook – Java Concurrency – NPI EA (cat=Java Concurrency)
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Handling concurrency in an application can be a tricky process with many potential pitfalls. A solid grasp of the fundamentals will go a long way to help minimize these issues.

Get started with understanding multi-threaded applications with our Java Concurrency guide:

>> Download the eBook

eBook – Java Streams – NPI EA (cat=Java Streams)
announcement - icon

Since its introduction in Java 8, the Stream API has become a staple of Java development. The basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use.

But these can also be overused and fall into some common pitfalls.

To get a better understanding on how Streams work and how to combine them with other language features, check out our guide to Java Streams:

>> Join Pro and download the eBook

eBook – Persistence – NPI EA (cat=Persistence)
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Working on getting your persistence layer right with Spring?

Explore the eBook

Course – LS – NPI EA (cat=REST)

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Get started with Spring Boot and with core Spring, through the Learn Spring course:

>> CHECK OUT THE COURSE

Partner – Moderne – NPI EA (tag=Refactoring)
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Modern Java teams move fast — but codebases don’t always keep up. Frameworks change, dependencies drift, and tech debt builds until it starts to drag on delivery. OpenRewrite was built to fix that: an open-source refactoring engine that automates repetitive code changes while keeping developer intent intact.

The monthly training series, led by the creators and maintainers of OpenRewrite at Moderne, walks through real-world migrations and modernization patterns. Whether you’re new to recipes or ready to write your own, you’ll learn practical ways to refactor safely and at scale.

If you’ve ever wished refactoring felt as natural — and as fast — as writing code, this is a good place to start.

eBook Jackson – NPI EA – 3 (cat = Jackson)