Nicolai Parlog

@nipafx.dev

2224 Followers 254 Following

Java enthusiast with a passion for learning and sharing. Developer Advocate at Oracle but views are my own.

3D J-Fall logo
A collage of 99 Inside Java Newscast thumbnails with a "100" superimposed on it
Screenshot of the following code: Stream.of("AB", "C", "DEF").filter(string -> string.length() == 1).highlander(); This shows no compile error, but is still an April Fool's joke. 😁
Prime Mike Tyson in the ring, staring off camera
Valhalla Roadmap * JEP 401 - value classes * JEP nnn - null-restricted types (separate from value classes) * JEP mmm - null-restricted value types * JEP 402 - minimize gaps between int and Integer! * and surely more
Time lapse of workers setting up a conference venue
Terminal command "jpm search"
A small Duke standing in front of YouTube's 100k subscriber plaque with a 200k sticker on it.
A human-sized laptop playing a video that shows, among other things, somebody typing on a keyboard. Behind the laptop is an old, wooden desk illuminated by a 2x human-sized desk lamp.
The JUG KArlsruhe Hall of Fame showing the top speakers and the respective number of talks: 1. Oliver Drotbohm: 9; 2. Nicolai Parlog: 7; 3. Michael Plöd: 5
Screenshot of a purchase confirmation of the SINGULARITY bundle (volumes 1-3) by William Hertling
Post-it notes with hand-written code next to a laptop
Java's Duke spinning the globe like a ball
void main() { System.out.println(sumCalibrationValues(inputs)); } int sumCalibrationValues(Collection<String> inputs) { return inputs.stream() .mapToInt(this::extractCalibrationValue) .sum(); } int extractCalibrationValue(String line) { var digits = replaceNumberWords(line) .chars() // integers [0-9] are in interval [48-57] .mapToObj(c -> c - 48) .filter(digit -> 0 <= digit && digit <= 9) .toList(); System.out.println(STR."\{line} -> \{digits}"); return digits.getFirst() * 10 + digits.getLast(); }
Screenshot of YouTube chapters: ~~ Chapters ~~ 0:00 Countdown 0:23 Java 21 preview 31:29 Playground reveal 1:03:57 Virtual threads tutorial #RoadTo21 ⇝ • Java 21 new feature: Virtual Threads ... 1:37:22 Virtual thread Q&A with Ron Pressler 2:00:02 Virtual thread support by Helidon (Tomas Langer) and Weblogic (Sid Joshi) 2:26:48 CloudWorld Java panel 3:15:17 dev.java community contributions 3:27:48 Pattern matching tutorial #RoadTo21 ⇝ • Java21 Brings Full Pattern Matching #... 3:51:23 Pattern matching Q&A with Brian Goetz 4:29:06 Java 21 performance improvements #RoadTo21 ⇝ • Java 21 JVM & GC Improvements #RoadTo21 4:41:11 Conversation with Geoffrey de Smet 4:59:33 OpenJDK release process with Mark Reinhold 5:31:03 Live at Paris JUG 5:58:49 Live at JUG Karlsruhe 6:23:23 Java 17-21 API improvements #RoadTo21 ⇝ • Java 21 API New Features #RoadTo21 6:40:12 API Q&A with Stuart Marks 7:31:27 Ground floor at Oracle CloudWorld with Georges
A very vertical photo with a laptop, speaker, sunglasses, and a cup at the bottom, then (upwards) a park with lots of people, a treeline with setting sun behind it, and blue sky.
A diagram that visualizes what the Twitter thread explained so far
A diagram that visualizes what the Twitter thread explained so far
A diagram that visualizes what the Twitter thread explained so far
A diagram that visualizes what the Twitter thread explained so far
var lang = Locale.caseFoldLanguageTag("fi-fi"); // prints "fi-FI" (note the RFC5646-correct case) System.out.println(lang);
var locales = Locale .availableLocales() .map(Locale::toString) .filter(locale -> !locale.isBlank()) .sorted() .collect(Collectors.joining(", ")); // prints af, af_NA, af_ZA, af_ZA_#Latn, agq, ... System.out.println(locales);
var httpClient = HttpClient.newHttpClient(); // use the client httpClient.close(); // or call `shutdown` and `awaitTermination` // yourself for more control: var httpClient = HttpClient.newHttpClient(); // use the client httpClient.shutdown(); httpClient.awaitTermination(Duration.ofMinutes(1)); // it also implements `AutoCloseable` try (var httpClient = HttpClient.newHttpClient()) { // use the client }
var words = new ArrayList<>(List.of("Hello", "new", "Collections", "shuffle", "method")); var randomizer = RandomGenerator.getDefault(); // using this API makes way more sense, when you're not using the default generator Collections.shuffle(words, randomizer); // prints the words above but with 99.17% chance in a different order System.out.println(words);
var hello = "Hello; World"; var semiColonSplit = hello.splitWithDelimiters(";", 0); //prints [Hello, ;, World] System.out.println(Arrays.toString(semiColonSplit));
var hello = "Hello, World"; var earlyCommaIndex = hello.indexOf(",", 0, 3); // prints "-1" System.out.println(earlyCommaIndex);
var builder = new StringBuilder(); builder.append("Hello"); builder.append(", "); builder.repeat("World", 3); builder.append("!"); // prints "Hello, WorldWorldWorld!" System.out.println(builder);
double number = 83.32; double clamped = Math.clamp(number, 0.0, 42.0); // prints "42.0" System.out.println(clamped);
var codePoint = Character.codePointAt("😃", 0); var isEmoji = Character.isEmoji(codePoint); // prints "😃 is an emoji: true" System.out.println("😃 is an emoji: " + isEmoji);