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Expanded Audience – Frontegg – Security (partner)
announcement - icon User management is very complex, when implemented properly. No surprise here.

Not having to roll all of that out manually, but instead integrating a mature, fully-fledged solution - yeah, that makes a lot of sense.
That's basically what Frontegg is - User Management for your application. It's focused on making your app scalable, secure and enjoyable for your users.
From signup to authentication, it supports simple scenarios all the way to complex and custom application logic.

Have a look:

>> Elegant User Management, Tailor-made for B2B SaaS

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Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:

> CHECK OUT THE COURSE

NPI – Spring Top – Temp – Non-Geo (Lightrun)

Get started with Spring 5 and Spring Boot 2, through the reference Learn Spring course:

>> LEARN SPRING
NPI – Lightrun – Spring (partner)

We rely on other people’s code in our own work. Every day. It might be the language you’re writing in, the framework you’re building on, or some esoteric piece of software that does one thing so well you never found the need to implement it yourself.

The problem is, of course, when things fall apart in production - debugging the implementation of a 3rd party library you have no intimate knowledge of is, to say the least, tricky. It’s difficult to understand what talks to what and, specifically, which part of the underlying library is at fault.

Lightrun is a new kind of debugger.

It's one geared specifically towards real-life production environments. Using Lightrun, you can drill down into running applications, including 3rd party dependencies, with real-time logs, snapshots, and metrics. No hotfixes, redeployments, or restarts required.

Learn more in this quick, 5-minute Lightrun tutorial:

>> The Essential List of Spring Boot Annotations and Their Use Cases

1. Overview

In this tutorial, we'll demonstrate how to programmatically find out which version of Spring, JDK, and Java our application is using.

2. How to Get Spring Version

We'll start by learning how to obtain the version of Spring that our application is using.

In order to do this, we'll use the getVersion method of the SpringVersion class:

assertEquals("5.1.10.RELEASE", SpringVersion.getVersion());

3. Getting JDK Version

Next, we'll get the JDK version that we're currently using in our project. It's important to note that Java and the JDK aren't the same thing, so they'll have different version numbers.

If we're using Spring 4.x, there's a class called JdkVersion, which we can use to get this information. However, this class was removed from Spring 5.x, so we'll have to take that into account and work around it.

Internally, the Spring 4.x JdkVersion class was getting the version from the SystemProperties class, so we can do the same. Making use of the class SystemProperties, we'll access the property java.version:

assertEquals("1.8.0_191", SystemProperties.get("java.version"));

Alternatively, we can access the property directly without using that Spring class:

assertEquals("1.8.0_191", System.getProperty("java.version"));

4. Obtaining Java Version

Finally, we'll see how to get the version of Java that our application is running on. For this purpose, we'll use the class JavaVersion:

assertEquals("1.8", JavaVersion.getJavaVersion().toString());

Above, we call the JavaVersion#getJavaVersion method. By default, this returns an enum with the specific Java version, such as EIGHT. To keep the formatting consistent with the above methods, we parse it using its toString method.

5. Conclusion

In this article, we learned that it's quite simple to obtain the versions of Spring, JDK, and Java that our application is using.

As always, the complete code is available over on GitHub.

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Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:

>> THE COURSE
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Get started with Spring 5 and Spring Boot 2, through the Learn Spring course:

>> CHECK OUT THE COURSE
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