Java After Eleven

start with a Java 11 code base

take it all the way to Java 16
(and beyond)

be amazed by how much changes

a showcase, not a tutorial

not a complete list

created with the lavish help
of the people in Twitch chat

released 09/2018

free support by Oracle ended 01/2019

free community support until 10/2024

more free and commercial support available

more powerful collections | Collectors::teeing

better async error handling | ↴
CompletableFuture::exceptionallyCompose

switch expressions | ↴

boolean bool = switch (ternaryBool) {
    case TRUE -> true;
    case FALSE -> false;
    case FILE_NOT_FOUND -> throw
            new FileNotFoundException("🤬");
};

helpful NPE messages

text blocks | ↴

var recommendation = """
        {
            "title": '$TITLE',
            "recommendations": $RECS
        }
    """;

obvious String formatting | String::format

records | record Title(String text)

type patterns | o instanceof Article a

Stream::toList

sealed clases | sealed class …​ permits