Explore a few approaches to finding the second smallest number in an array.
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Learn Spring Security OAuth for Teams
Level up the way your team secures Java web applications.
Learn Spring for Teams
Level up your team’s Spring game and take them from no experience to actually building stuff.
Learn Spring Data JPA for Teams
Help your team learn and code through real-world scenarios using a Spring Data JPA project.
Learn Spring Data JPA Course
Learn and code through real-world scenarios using a Spring Data JPA project.
Learn Spring Course
Get started with the Spring Framework by building a practical project with Spring 6 and Spring Boot 3.
Learn Spring Security OAuth Course
The definitive guide to secure your application with the new OAuth2 stack in Spring Security 6 and Boot 3.
Learn Spring Security Core Course
The reference, in-depth dive into the core of Spring Security 6 and Boot 3, through the project-based lessons.
Learn Spring Security Course
The reference, in-depth dive into Spring Security 6 and Boot 3, with the full 88 project-based lessons.
REST with Spring Course
Learn to implement a production-grade, fully secure REST API with Spring 6 and Spring Boot 3.
Introduction to JavaParser
A quick and practical guide to JavaParser.
Get the First and the Last Elements From an Array in Java
Learn how to access the first and last elements of a Java array.
Configuring Retry Policy for gRPC Request
Learn how to implement retry policies in gRPC.
How to Convert Between ZonedDateTime and Date in Java
Learn how to convert between ZonedDateTime and Date in Java.
Perform Action Only if All Optionals Are Available
Learn how to perform an action only if all optionals are available.
How to Iterate a List of Maps in Java
Explore various techniques for iterating through a List of Maps in Java.
Using Reactor Mono.cache() for Memoization
In this tutorial, we learn about memoization and demonstrate how to use Mono.cache() from the Project Reactor.
Inheritance vs. Composition in JPA
Explore the fundamental differences between inheritance and composition in JPA entity modeling.
OpenAPI Custom Generator
Learn the steps required to create a custom generator for the OpenAPI generator tool.
Save Child Objects Automatically Using JPA
Learn how to save child objects automatically with JPA.