Java

For Java developers and security analysts, decompiling .class or .jar files to restore original source code is a critical skill. Among the tools available, JD-GUI stands out as a user-friendly and powerful solution. This article explores JD-GUI’s features, practical applications, and limitations. 1. What is JD-GUI? JD-GUI is an open-source graphical tool for decompiling Java bytecode (.class files) and .jar archives into readable source code. Key features include: Cross-Platform Support: Works on Windows, macOS, and Linux. Intuitive Interface: Drag-and-drop functionality for quick analysis. High Accuracy: Restores variable names and package structures (except for obfuscated code). Java Version Support: Compatible with Java 1.1–7 (does not support Java 8+ features like lambda expressions). Unlike older tools like Jad, JD-GUI prioritizes readability, making it ideal for understanding code logic rather than bytecode-level accuracy. ...

Servlet Mappings Made Simple: A Beginner’s Guide Servlet mappings are a fundamental concept in Java web development. They define how requests from a web browser are directed to specific servlets on a server. Think of servlet mappings as traffic signs on a highway—they guide incoming requests to the right destination for processing. What is a Servlet? A servlet is a Java program that runs on a server and handles client requests. For example, it might process form data, interact with a database, or generate dynamic web pages. ...