What Does “Immutable” Mean? In Java, immutable means once a String object is created, its value cannot be modified. Any operation that appears …
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1. Compact Strings (Java 9+) What Changed? Prior to Java 9, Strings used a char[] (2 bytes per character). Compact Strings optimize memory by: …
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PEMDAS is a mnemonic for the order of operations in arithmetic. It ensures calculations are performed consistently. In Java, it governs how expressions …
Read More PEMDAS in Java: Order of Operations Explained with Examples
Spring Boot Async Tasks allow developers to execute time-consuming operations (e.g., API calls, file processing, or database updates) without blocking the main …
Read More Spring Boot Async Tasks: A Complete Guide to Asynchronous Execution
If you’re using Spring Boot scheduled tasks but notice tasks overlapping, lagging, or blocking each other, the culprit is likely the default …
Read More Spring Boot Thread Pool Configuration: Optimizing Scheduled Tasks for Performance
Spring Boot Scheduled Tasks are essential for automating repetitive jobs like database cleanup, report generation, or API polling. In this …
Read More How to Implement Scheduled Tasks in Spring Boot: A Step-by-Step Guide
Learn to Create, Read, Update, and Delete Data with Java Database Connectivity CRUD (Create, Read, Update, Delete) forms the foundation …
Learn to Build, Manage, and Scale Database-Driven Java Applications A Step-by-Step JDBC Tutorial for Beginners and Beyond Why Learn JDBC? …
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NullPointerExceptions (NPEs) are a frequent headache for Java developers. They occur when your code tries to access a method or …
Read More How to Avoid NullPointerExceptions (Best Practices)
QueryDSL is a powerful framework for building type-safe, dynamic queries in Java applications. With Spring Boot 3 adopting Jakarta EE and deprecating javax.persistence, …
Read More How to Use QueryDSL in Spring Boot 3: A Complete Guide to Type-Safe Queries [2025 Update]