Apache Tomcat and Java 11

I see from presentation slides, on the Apache Tomcat site, that Java 11 is in the plans but it makes reference to a Java 11 JRE, which isn't available. How will Tomcat handle not having a JRE available to install?

Does Tomcat support Java 11?

Bookmark this question. Show activity on this post. I see from presentation slides, on the Apache Tomcat site, that Java 11 is in the plans but it makes reference to a Java 11 JRE, which isn't available.

What version of Java does Tomcat use?

Tomcat 7, installed via apt-get. JDK 6 and JDK 7.

What version of Java does Tomcat 10 support?

Tomcat 10.1. x will require Java versions 11 and higher, and will use Servlet 6.0, JSP 3.1, EL 5.0, and JWS 2.1.

What version of Java does Tomcat 9 use?

Java 8 required Apache Tomcat 9.0. x requires Java 8 or later.

tl;dr

Just download and use a JDK, obtained from any of several vendors. But be sure to read the licensing (in particular, Oracle changed the terms to their Oracle-branded JDK).

FYI: I have been running:

Tomcat 9.0.14 on Java 11.0.2 using Zulu product from Azul Systems
Tomcat 9.0.26 on Java 13 from AdoptOpenJDK

…on macOS Mojave without a problem.

No more JRE^†, just JDK

Oracle no longer intends for end-users to be installing a JRE or a JDK. Java Applets in a browser and Java Web Start app delivery are both being phased out, leaving the end-user with no need for a JRE. Java-based apps are expected to bundle their own Java implementation. The only folks consciously installing a JDK will be developers & server-side sysadmins.

Important:

Understand clearly the nature of the OpenJDK project, as explained in Wikipedia
Read the white paper Java Is Still Free, authored by key members of the Java community.

Here is a flowchart diagram that may help you finding and deciding amongst the various vendors providing a Java 11 implementation.

Flowchart diagram to aid in finding and choosing an implementation of Java 11 from various vendors.

Motivations in choosing a vendor for Java

^†If you insist on a JRE rather than JDK, nose around on AdoptOpenJDK.net under their "Other Platforms" link. See Answer by matson kepson. But I suggest just using the JDK.

AdoptOpenJDK.net

Look at AdoptOpenJDK project website, for Java builds based on OpenJDK.

Download the latest JRE and JDK:
https://adoptopenjdk.net
For source code:
https://github.com/AdoptOpenJDK/openjdk-jdk11

I have used their night builds to workaround the problem of missing JRE in JDK package https://adoptopenjdk.net/nightly.html?variant=openjdk11

BUT as of now, they have a problem with JRE build please search for the builds prior to 11/9/2018 until they fix this problem. Link to bug https://github.com/AdoptOpenJDK/openjdk-build/issues/796

Nightly build OpenJDK

Apache Tomcat and Java 11

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java-11

tomcat

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