Java Development
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Get ArrayLists of Values and Keys from a HashMap in Java
In Java, the HashMap is a commonly used data structure that stores keys-value pairs. Sometimes, we may need to extract…
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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 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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Sorting Java ArrayList in Ascending and Descending Order
ArrayList, which is part of the Java Collections Framework is a popular choice for storing and managing collections of data…
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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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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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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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Convert 12-Hour Time into a 24-Hour Time Format using Java
Converting time from the 12-hour clock format to the 24-hour clock format is a common programming task, particularly when dealing…
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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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How To Make a Maven Build Fast
Efficient build processes are crucial for software development projects. When working with Apache Maven, a build automation tool for Java projects, you…
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