How to Call One Constructor from Another in Java
In Java, constructors are special methods used to initialize objects. Sometimes, you may want one constructor to call another within the same class. This is known as constructor chaining and…
Does the Java finally Block Always Execute? A Complete Guide with Exceptions and Best Practices
Table of Contents What Is a finally Block? When Does the finally Block Execute? When Does the finally Block Not Execute? Best Practices for Using finally FAQ: Common Questions About…
How to Check if a Java Array Contains a Value – Best Methods Explained
Checking whether a Java array contains a specific value is a common programming task. In this guide, we’ll explore multiple efficient methods to test array membership, compare their performance, and…
How to Fix ‘android.os.NetworkOnMainThreadException’ in Android: A Complete Guide
Encountering the android.os.NetworkOnMainThreadException error in your Android app? This common issue occurs when you attempt to perform network operations on the main UI thread, which Android strictly prohibits to ensure…
How to Create an Executable JAR with Dependencies Using Maven: A Step-by-Step Guide
Packaging your Java project into a single executable JAR file with all dependencies is essential for easy distribution and deployment. In this guide, you'll learn how to use Maven plugins…
How to Define a Byte Array in OpenAPI 3.0
When migrating your API from Swagger 2.0 to OpenAPI 3.0, you might encounter issues with representing a byte array in your DTOs. In Swagger 2.0, you could define a byte…
Enable the “Authorize” Button in springdoc‑openapi‑ui for JWT Authentication
When building a Spring Boot API with JWT authentication, having an easy way to test secured endpoints is essential. One common challenge is enabling the Authorize button in springdoc‑openapi‑ui (Swagger…
How to Deploy a Maven Project to Tomcat: Fixing Compilation Errors with Local Dependencies
Deploying a Maven project to Apache Tomcat should be straightforward, but compilation errors due to missing dependencies or misconfigured builds can derail your progress. In this guide, we’ll resolve common…
How to Access and Modify Files in a Dockerized Spring Boot App: Fixing FileNotFoundException
If you're encountering FileNotFoundException when Dockerizing your Spring Boot app that reads/writes files, you're not alone. This common issue arises because files packaged inside a JAR aren't accessible via traditional…
Why Printing “B” in Java is Slower Than “#”? NetBeans Performance Issue Explained
If you've ever noticed that printing the letter "B" in Java is significantly slower than printing "#" in NetBeans, you're not alone. This unexpected slowdown has puzzled many developers. In…
Refactoring DateUtils in Java: Improving Consistency & Maintainability
Handling dates in Java can become cumbersome when different formats and redundant logic are scattered throughout the codebase. This guide walks through refactoring a DateUtils utility class to standardize date…
Fixing “ACCESS_TOKEN_SCOPE_INSUFFICIENT” in Gmail API: A Guide for Java Developers
Encountering the ACCESS_TOKEN_SCOPE_INSUFFICIENT error in the Gmail API? This issue occurs when your OAuth token lacks the required permissions (scopes) for a specific operation, such as reading or sending emails.…