Java
Complete Java tutorials, concepts, and reference material for working developers.
10 Tutorials
0 Cheat sheets
3 Related tools
Core concepts
01 Java Queues, Lists, Maps, and Collections Explained 02 How to Set Environment Variables in Java? 03 How to Handle Files in Java? Complete I/O Guide 04 JSON Parsing in Java — A Step-by-Step Tutorial with Jackson 05 Java Lambda Functions: Syntax and Practical Examples 06 for Loop in Java: while, do-while, and switch Explained 07 What is a REST API in Java? A Complete Guide with Examples 08 Java String Formatting: String.format and printf Guide 09 Java String Methods: substring, split, contains, indexOf 10 URL Encoding and Decoding in Java — A Step-by-Step Tutorial
Related tools
All tools → JSON Formatter Online: Format, Validate & Minify Instantly Use this JSON formatter online to format, validate, and minify JSON instantly. Also converts XML to JSON and JSON to XML — all free, no server uploads. Regex Tester — Free Online Tool Test regular expressions against text with real-time match highlighting. See all matches, groups, and an explanation of your pattern. Base64 Encoder/Decoder — Free Online Tool Encode and decode Base64 strings instantly in your browser. Supports standard text and URL-safe Base64 formats — no data sent to servers.