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Core Java
Calculate the Distance Between Two Coordinates in Java
Calculating the distance between two coordinates is often an interesting learning. In this article, we will see a practical approach…
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spring
Rename Files and Folders in Amazon S3 Using Spring
Amazon S3 (Simple Storage Service) is a scalable object storage service offered by Amazon Web Services. It allows users to…
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Core Java
Check Key-Value Pair Existence In JSON Array
JSON (JavaScript Object Notation) is a lightweight data interchange format. It uses key-value pairs to store data objects. Keys are…
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spring
Spring WebClient POST Example
WebClient is a non-blocking, reactive web client in Spring WebFlux, enabling asynchronous communication with HTTP services. It simplifies making HTTP…
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Software Development
Docker Kafka Topic Creation
Apache Kafka is an open-source stream-processing software platform developed by the Apache Software Foundation. Kafka uses topics, partitions, and replication…
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Core Java
Sort a Java Map In Descending Order
Sorting data is a fundamental operation in all programming languages, allowing for efficient organization and retrieval of information. Let’s explore…
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sql
PostgreSQL COALESCE
PostgreSQL’s COALESCE is a powerful SQL function designed to handle NULL values in database queries. When applied, COALESCE evaluates a…
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Core Java
Convert String ArrayList To Array In Java
The need to convert a String ArrayList to an Array is very common in Java programming. The core language provides…
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Core Java
Java Validation List Annotations
Java Validation List Annotations empower developers to validate lists of elements within applications. By specifying rules and constraints, these annotations…
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Enterprise Java
Java Kafka Bootstrap Server
In Kafka configuration, the “bootstrap-server” parameter plays a pivotal role. It represents the initial connection point for Kafka clients. When…
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