Java

Explore a vast library of Java code snippets. Find inspiration, learn best practices, and streamline your coding process with our carefully selected examples.

Javalin File Upload: Simple Examples for Beginners

Master Javalin file uploads with step-by-step examples. Learn basic to advanced implementation techniques including file validation, error handling, and security best practices.

JavalinFile UploadJavaWeb Development

Explorer

Discover a treasure trove of Java code snippets, tailored to your programming needs. From basic syntax to advanced algorithms, our curated collection offers practical solutions to accelerate your development projects.

Javalin Servlets and Filters

Master Javalin Servlets and Filters with practical examples. Learn essential concepts through easy-to-follow code snippets perfect for Java beginners.

JavaJavalinServletFilter

Javalin Framework Made Simple

Learn Javalin - lightweight Java/Kotlin web framework. Build scalable web applications with intuitive routing, JSON processing, WebSocket, and async capabilities.

JavalinJavaKotlinWeb Framework

Java NullPointerException, and How Do I Fix It?

Learn Java what a NullPointerException is, why it occurs, and how to fix and prevent it in your code. Explore practical solutions, best practices, and resources for handling null references effectively.

NullPointerException Java NullPointerException How to fix NullPointerException NullPointerException in programming

How to Avoid Checking for Nulls in Java

Learn how to avoid null checks in Java using Optional, the Null Object Pattern, annotations, and modern libraries. Discover best practices for writing cleaner, null-safe code.

avoid null checks in Java Java Optional Null Object Pattern Java null safety

What is the Difference Between `==` and `equals()` in Java?

Learn the key differences between == and equals() in Java, including examples, best practices, and when to use each. Understand how to compare objects and primitives effectively.

NullPointerException Java NullPointerException How to fix NullPointerException

HashMap vs Hashtable in Java

Learn the key differences between HashMap and Hashtable in Java, including synchronization, performance, and usage. Discover when to use each and explore modern alternatives like ConcurrentHashMap.

HashMap vs Hashtable HashMap in Java Hashtable in Java Java HashMap

Create, Detect, and Handle Memory Leaks in Java

Learn what is memory leak in Java, how to create, detect, and handle memory leaks in Java and Spring Boot. Includes examples, tools, and tips for fixing stack and byte array memory leaks.

Memory Leaks in Java