Java

Complete Java tutorials, concepts, and reference material for working developers.

8 Tutorials
0 Cheat sheets
3 Related tools

Core concepts

01 How to Set Environment Variables in Java? 02 How to Handle Files in Java? Complete I/O Guide 03 JSON Parsing in Java — A Step-by-Step Tutorial with Jackson 04 Java Lambda Functions: Syntax and Practical Examples 05 How to Call Lambda Functions in Java: A Complete Guide 06 What is a REST API in Java? A Complete Guide with Examples 07 Java String Formatting: String.format and printf Guide 08 URL Encoding and Decoding in Java — A Step-by-Step Tutorial

Related tools

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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.