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New posts in java-21
How to add multiple headers to RestClient for Spring Boot 3.2
Jul 24, 2026
java
rest
client
java-21
spring-boot-3
Record patterns in java without instanceof nor switch
Jul 23, 2026
java
pattern-matching
java-21
record-patterns
Why ReentrantLock is better for virtual threads than synchronized?
Jul 20, 2026
java
concurrency
java-21
virtual-threads
Does switch support objects other than Byte, Short, Character, Integer, enumerated types, and the String type?
Jul 22, 2026
java
switch-statement
pattern-matching
java-21
switch-expression
Java 21 structured concurrency, need predictable subtask exception ordering
Jul 21, 2026
java
parallel-processing
java-21
project-loom
structured-concurrency
Under JDK 21, Maven compilation results in an error
Jul 18, 2026
java
spring-boot
maven
java-21
Lombok Annotations Not Working in Spring Boot Project (Java 21)
Jul 11, 2026
spring-boot
maven
lombok
annotation-processing
java-21
Why do Java 21 virtual threads need less memory than platform threads?
Jun 29, 2026
java
multithreading
java-21
project-loom
virtual-threads
Incompatible changes in generics in Java 21
Jun 27, 2026
java
generics
jdbi
java-21
What can explain a deadlock only occuring with virtual threads?
Jun 24, 2026
concurrency
deadlock
java-21
virtual-threads
Spring boot application start generate Unsupported class file major version 65 after java 21 migration
Jun 24, 2026
spring-boot
maven
java-21
How to limit the number of Spring @Async tasks with virtual threads enabled
Jun 21, 2026
spring
spring-boot
spring-async
java-21
virtual-threads
Why does the Java collator for the Hungarian locale mix E and É?
Jun 18, 2026
java
locale
collation
rules
java-21
Java 21 virtual thread executor performing worse than executor with pooled OS threads?
Jun 08, 2026
java
executorservice
java-21
virtual-threads
Java 21 Regex Word-boundary matcher Unicode change
May 27, 2026
java
regex
java-21
word-boundary
Why is openjdk:21 now missing from Docker Hub? [duplicate]
May 25, 2026
java
docker
dockerhub
java-21
Should virtual thread die fast?
May 11, 2026
java
multithreading
java-21
project-loom
virtual-threads
Can a ScopedValue be applied to "the current" StructuredTaskScope without creating a new task?
May 04, 2026
java
java-21
structured-concurrency
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