How Can I Find a Java 11 JRE Without Downloading It?

Finding Java 11 JRE Without a Download Option

Java 11 does not have a downloadable JRE, unlike previous Java versions. This can lead to issues when running Java-based software, resulting in "no Java run-time environment" errors.

Understanding the End of JRE Downloads

Oracle no longer intends for end-users to install JREs or JDKs, as Java applets and web app delivery are being phased out. End-users are not expected to need JREs, and Java-based apps should bundle their own Java implementations. Developers and server administrators should install JDKs.

OpenJDK Project

Understand the OpenJDK project, which is a source for Java implementations. The Java Client Roadmap Update and Java Is Still Free whitepapers provide further insights.

Java Platform Module System (JPMS)

Learn about JPMS, jlink, and jpackage. Desktop apps should bundle their own Java runtime, using these tools to create custom-fit runtimes.

Vendor Selection Flowchart

This flowchart assists in choosing a vendor for a Java 11 implementation based on factors such as target audience, priority, and desired features.

Vendor Mapping Table

The table maps potential motivations and considerations to suggested Java vendors.

Compatibility Concerns

The OpenJDK project includes the OpenJDK Community Technology Compatibility Kit (TCK). Vendors can self-declare TCK test passing, relying on an honor system. Products built on OpenJDK source code generally exhibit compatibility.

Technology differences may include the HotSpot or OpenJ9 engine, and JVM type. These differences are unlikely to result in incompatibilities.

Vendor update schedules may vary, with commercial support vendors tending to release patches more quickly. Vendors may also modify their code bases within Java specification compliance.

Despite potential variations, the Java community is committed to preventing fragmentation. Collaboration and open sharing of improvements aim to ensure compatibility across vendors.

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