Java Cheatsheet
NewJava syntax, collections, streams, generics, records, and switch expressions at a glance.
Frequently Asked Questions
Does this Java cheatsheet include newer language features or just old basics?
It includes modern entries like switch expressions, text blocks, records, Optional fallbacks, and pattern matching for instanceof, not just classic class and loop syntax.
Can I narrow it down to Streams without scrolling through collections and OOP items?
Yes. Use the Streams API tab, or search terms like groupingBy, flatMap, or findFirst. The filter checks category, title, syntax, description, and example text.
What does Show full syntax actually change?
The default card view shows a short reminder such as stream().map(...). The toggle swaps that for the fuller code snippet, and Copy syntax always copies the full snippet version.
Does it cover practical collection patterns like Map defaults and grouping?
Yes. The data includes List.of, Map.of, HashMap, getOrDefault, computeIfAbsent, Collectors.groupingBy, Collectors.joining, and stream pipelines that end in toList().
Why am I getting “No Java entries match your current filters”?
That happens when your search text and selected category leave no matching cards. Clear the search box or switch back to All to restore the full set.