Does Jacoco 0.8.7 JAR supports JDK 21 classes

[Mehul Parmar]

Does Jacoco 0.8.7 JAR supports JDK 21 classes. Do we have a table where you guys maintain backward comparibility of JARs and JDk version.

[Marc Hoffmann]

Dear Mehul,

please check the change log: https://www.jacoco.org/jacoco/trunk/doc/changes.html

Here you find for 0.8.7:

• JaCoCo now officially supports Java 15 and 16 (GitHub #1094, #1097, #1176).
• Experimental support for Java 17 class files (GitHub #1132).

JaCoCo 0.8.7 was released in 2021, Java 21 was released 2 years later…

The minimum required Java runtime version for all JaCoCo releases is Java 5. Class files are supported back to Java 1.0.

Regards,

-marc

On 8. Apr 2025, at 08:16, Mehul Parmar <mehulpa...@gmail.com> wrote:

Does Jacoco 0.8.7 JAR supports JDK 21 classes. Do we have a table where you guys maintain backward comparibility of JARs and JDk version.

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[Mehul Parmar]

Hello,

I am little bit confused. Class files are supported back till 1 but for older jacoco versions right? Does it mean 0.8.11 and above will support creating reports from java 21 classes?

Regards

Mehul Kumar Parmar

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[Marc Hoffmann]

Exactly!

On 10. Apr 2025, at 07:22, Mehul Parmar <mehulpa...@gmail.com> wrote:



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[Mehul Parmar]

I have a JacocoAgent running in server model with Jacoco 0.8.12 JAR in a Testenvironment. The exec created in the Testenv I am downloading through a Java service and trying to generate reports from 0.8.7 Jacoco Jar and JDK 21 classes. Will this setup work and if not where is the issue since exec format has not changed from 0.8.7 to 0.8.12, right?

[Marc Hoffmann]

No, this will not work. JaCoCo 0.8.7 does not support Java 21 class files. Also not for report generation.

On 10. Apr 2025, at 12:13, Mehul Parmar <mehulpa...@gmail.com> wrote:

I have a JacocoAgent running in server model with Jacoco 0.8.12 JAR in a Testenvironment. The exec created in the Testenv I am downloading through a Java service and trying to generate reports from 0.8.7 Jacoco Jar and JDK 21 classes. Will this setup work and if not where is the issue since exec format has not changed from 0.8.7 to 0.8.12, right?

To view this discussion visit https://groups.google.com/d/msgid/jacoco/7b0e5284-97c1-4b49-900c-b3cce52f8578n%40googlegroups.com.

[Mehul Parmar]

Okay so Exec file format has not changed from 0.8.7 to 0.8.12, but since Java 21 version support is required, so that's I will need to upgrade my report generating Jacoco helper classes. In my JAVA microservice, we are not directly using a JAR of 0.8.7 but Classes from jacoco repo for each version(https://github.com/jacoco/jacoco/tree/master/org.jacoco.core/src/org/jacoco/core).

What would be a good to way to upgrade our Java microservice to a new version of Jacoco, instead of importing these Jacoco classes for a new version released every time?

[Marc Hoffmann]

Try to use the JARs we publish on Maven for every release.

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