Fine-Tune an OpenAI ChatGPT Model: Step-by-Step Example
In this chatGPT tutorial, explore the entire life cycle of fine-tuning models from preparing training data, creating a fine-tuned model, and using it programmatically.
Getting Started with ChatGPT API and Python
Learn the basics of ChatGPT, the ChatGPT API for Python, and how to use it for creating and performing NLP tasks with examples.
Spring 6 Programmatic Validator: A Comprehensive Guide
Spring 6 Programmatic Validator API allows to add fine-grained validation rules beyond the capabilities of annotations-based declarative approach.
Spring 6 JdbcClient: When and How to Use it?
Since Spring 6.1, JdbcClient provides a unified client API for JDBC query and update operations, offering a more fluent and simplified interaction model.
Big O Notation: Measuring the Algorithm Efficiency
Big O notation categorizes the efficiency of a given algorithm and describes the upper bound of the growth rate of a function as the input grows.
Elasticsearch with Spring Data and Spring Boot 3
This Spring Boot tutorial explores the basics of Elasticsearch such as creating index, CRUD operations, searching, and querying the documents with examples.
Capture and Analyze a Thread Dump in Java
Learn to capture and analyze thread dumps in Java either manually to using tools such as JStack, VisualVM, FastThread, TDA and JProfiler, etc.
Hibernate Soft Delete: @SoftDelete Example
Since version 6.4, Hibernate @SoftDelete annotation provides first-class support for soft delete feature and transparently manages the indicator column name and values.
Spring WebClient Retry and RetryWhen (with Examples)
Learn to retry the failed requests with Spring WebClient’s retry() and retryWhen() operators including retry on specific exception cases.
Running JUnit Tests with Gradle
By utilizing the –tests option, we can run unit tests using Gradle from entire test suites to specific test classes or methods.
JUnit 5: Non-Static @BeforeAll and @AfterAll Methods
Learn to write non-static @BeforeAll and @AfterAll methods with @TestInstance(TestInstance.Lifecycle.PER_CLASS) to access test instance-specific variables.
Spring Bean Naming: Default, Explicit and Custom Strategies
In Spring, the default naming strategy utilizes the named of annotated classes or methods. Learn to customize it by explicit or custom naming with examples.
SpringExtension for JUnit 5: Why Do We Need It?
SpringExtension integrates the Spring TestContext Framework into JUnit 5 Jupiter extension model, sets up the ApplicationContext, and manages dependencies.
[Solved] Maven-compiler-plugin: release version 21 not supported
Learn the root cause and the solution behind the error “Maven-compiler-plugin: release version not supported” while upgrading a Java project.
Spring Boot Transaction-Aware Caching Example
In Spring tutorial explores transaction-aware caching using transactionAware property and TransactionAwareCacheManagerProxy class with example.
Create and Extract Jar File on Linux, MacOS and Windows
This Java cheat sheet discussed the JDK jar utility for creating and extracting the JAR files. It mimics the Unix tape archive command, tar.
Installing OpenJDK on Linux, macOS and Windows
Learn to install OpenJDK Correto distributed by Amazon on different operating systems such as Linux, macOS, and Windows.
Web Scraping with Python Beautiful Soup: Cheat Sheet
Beautiful Soup is a Python library for parsing and navigating HTML and XML documents, making it easy to extract and manipulate data from web pages.
List and Filter Docker Containers: A Cheat Sheet
Learn to list Docker containers, customizing the output format and filtering containers based on their running/stopped status and names, etc.
Java Align Text in Columns: Print in Tabular Format
Using the TextTable class or String.format() methods, we can easily align the text in columns and print them in the console or any output file.
Run a Spring Boot and Postgres Application on Podman
This guide explores the step-by-step process of containerization and running a Spring Boot application with PostgreSQL database using Podman.
Spring Boot REST API Timeout (with Examples)
Learn to handle REST API timeouts on the server side using Spring boot MVC async, Resilience4j, @Transactional, RestTemplate and WebClient with examples.
Convert JSON Array to List: Gson, Jackson and Org.json
Learn to use Gson, Jackson, and Org.json libraries to convert a JSON array into an ArrayList of objects with easy-to-understand examples.
Java 21 Unnamed Patterns and Variables (with Examples)
Unnamed patterns and variables represent the record components and local variables as an underscore (_) to denote that we’re not interested in them.
Java 21 Scoped Values: A Deep Dive with Examples
In Java 21, Scoped values are implicit method parameters and help in sharing data with virtual threads that can be created in millions.
AWS SQS with Spring Cloud AWS and Spring Boot 3
Learn to configure AWS SQS in Spring Cloud AWS application, create and configure Queues, produce and consume messages and acknowledgements.
Kafka with Schema Registry and Avro Serialization
Learn to integrate Kafka with Apache Avro and Schema Registry to manage the changes in Schema over time, and a demo to test this integration.
Git Interview Questions for DevOps and Testers
Top 30+ Git interview questions and answers providing a thorough exploration of essential concepts and practices within the Git version control system.
Java Math.ceil() vs. Math.floor() vs. Math.round()
In this Java tutorial, we’ll explore the Math.round(), Math.ceil() and Math.floor() methods in detail, understand their differences and discover their use cases.
Spring vs. Spring Boot: What’s Difference?
This Spring vs. Spring Boot tutorial lists the differences between Spring framework and Spring Boot based on general characteristics and features.
Spring Boot OpenFeign Client Tutorial
Learn about Feign Client and how to use it in a Spring Boot application. Also, learn the commonly used default Feign configurations and customizing them.
Java Enumeration, Iterator, ListIterator and Spliterator
In Java, all types of enumerations and iterators (such as Iterator, ListIterator, SplitIterator) are simply navigational cursors and the main purpose of these cursors is to iterate over the elements of the collection. Each cursor has its own features, advantages and disadvantages. In this article, we will walk through these …
Python Numpy 101: A Beginners Guide
Learn NumPy basic concepts, constants, attributes and how to use NumPy for data visualization, followed by the advantages and limitations.
TypeScript Exception Handling (+ Custom Exceptions)
Learn TypeScript error handling using try, catch, finally blocks and throw statement. Also, learn built-in error types as well as the custom exceptions.
TypeScript Array map() vs flatMap(): Whats’s Difference?
Learn the syntax, simple examples and noticeable differences between TypeScript Array’s map() and flatMap() operations with examples.
TypeScript Record vs Map: What’s Difference?
Let us explore the syntax, provide simple examples, and outline the differences between Record type and Map data structure in TypeScript.
TypeScript Record
TypeScript Record is a utility type that creates an object type where the keys and the values associated with those keys are of the specified types.
Spring WebMvcConfigurer: Customize Default MVC Configurations
Learn to use Spring WebMvcConfigurer to customize various aspects of Spring MVC, such as argument resolvers, view resolvers, exception handling, and more.
TypeScript vs. JavaScript: Side-by-Side Comparison
TypeScript is a modern language and the superset of JavaScript with additional features such as type safety, readability and maintenance.
Tracking @Entity Creation and Updation Timestamps
Learn to track or audit the @Entity creation and updation timestamps using Spring Data annotations, JPA lifecycle callbacks, Hibernate and Envers library.
Spring Boot WebClient POST Example
Spring Boot WebClient example discusses sending HTTP POST requests, submitting form data and handling the response status, headers and body.
Displaying Images with Thymeleaf and Spring Boot
Learn to display images from different sources (e.g., resources directory or database) using the Thymeleaf view templates in a Spring Boot application.
Spring Boot Hello World Example: Beginners Guide
Spring Boot is an open-source framework that simplifies the development of stand-alone, production-grade Spring-based MVC applications and microservices.
Java Records in JPA/Spring Data: Challenges and Usecases
Java records cannot be used as the replacement for JPA entities because they restrict the byte code manipulation, generally required by frameworks to work.
Java Array vs. ArrayList: Comparison and Conversion
Java ArrayList is part of the collection framework and implementation of resizable array data structure. Learn when to use array and arraylist.
Java ArrayList Length and Size
Java ArrayList does not publicly expose the length of the backing array, and only the count of the stored elements can be retrieved using its size() method.
Java ArrayList Sort: Ascending and Descending Order
Learn to sort Java ArrayList in ascending and descending order using ArrayList.sort(), Collections.sort(), Comparator interface and Java 8 Streams.
Java – Convert Decimal to Hexadecimal and Vice-versa
Learn the conversion of decimal to hexadecimal and using converting hex to decimal in Java using the built-in APIs and custom methods.
Spring @PathVariable and @RequestParam
Learn about Spring @PathVariable and @RequestParam annotations and compare them with Jakarta’s @PathParam and @QueryParam annotations.
Spring Boot RestClient (with Examples)
Starting Spring Framework 6.1 and Sring Boot 3.2, we can use the Spring RestClient for performing HTTP requests using a fluent and synchronous API. The RestClient works over the underlying HTTP client libraries such the JDK HttpClient, Apache HttpComponents, and others. As the name suggests, RestClient offers the fluent API design …