Java 11

Java 11 (September 25, 2018) is a Long-Term Support (LTS) release and the first LTS under the six-month release cadence. It removes Java EE and CORBA modules from the JDK, standardizes the HTTP Client API, and open-sources Flight Recorder. Oracle ended free public updates on October 1, 2019. 

Java 11 Features 

HTTP Client (JEP 321) 

Modern replacement for HttpURLConnection. Supports HTTP/1.1, HTTP/2, and WebSocket with synchronous and asynchronous modes. Standardized in java.net.http after incubating in Java 9. 

HttpClient client = HttpClient.newHttpClient(); 

HttpRequest request = HttpRequest.newBuilder() 

    .uri(URI.create(“https://example.com”)) 

    .build(); 

HttpResponse<String> response = client.send(request, 

    HttpResponse.BodyHandlers.ofString()); 

Flight Recorder (JEP 328) 

Low-overhead event-based profiling framework built into the JVM. Previously a commercial Oracle JDK feature. Java 11 open-sourced JFR under OpenJDK. Collects GC pauses, thread statistics, method profiling, and allocation events with sub-percent overhead. 

java -XX:StartFlightRecording=duration=60s,filename=app.jfr -jar app.jar 

jfr print app.jfr 

Local Variable Syntax for Lambda Parameters (JEP 323) 

Extends var (from Java 10) to lambda parameters, enabling type annotations without full type declarations. 

BiFunction<Integer, Integer, Integer> add = 

    (@Nonnull var a, @Nonnull var b) -> a + b; 

Single Source File Launch (JEP 330) 

Run .java files directly without explicit compilation. Supports shebang for executable scripts. 

java HelloWorld.java 

Additional Java 11 Features 

Java 11 Removals 

Java 11 removed Java EE modules and CORBA from the JDK. This is the most common migration issue when upgrading from Java 8. 

Maven artifacts use the jakarta. namespace (Jakarta EE 8+). 

Java 11 Download and Installation 

Azul provides TCK-certified OpenJDK 11 builds: 

• Free community builds: azul.com/downloads 

• Enterprise builds: SLAs, security patches, indemnification, FIPS 140-2 at azul.com/products/core 

Platforms: Linux (x64, ARM64, POWER, s390x), Windows, macOS (x64, ARM64), Docker, AWS, Azure, GCP. 

# Set JAVA_HOME after download 

export JAVA_HOME=/path/to/zulu11 

export PATH=$JAVA_HOME/bin:$PATH 

java -version  # openjdk version “11.0.x” 

Java 11 Downloads

Download or Request a Trial

How Azul Supports Java 11 

• Full, Extended, and Lifetime Support phases with quarterly security patches aligned to Oracle CPU schedule 

• Multi-platform binaries: Intel x64, ARM64, POWER, s390x 

• Docker and Kubernetes images: Container-ready Java 11 runtimes 

• Migration tooling: Assessment tools and professional services for upgrading to Java 17, 21, or 25 

• FIPS 140-2 compliant builds: For regulated industries 

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