Update to pom-scijava 44.0.0 and build on Java 21

- POM: bump parent pom-scijava 34.1.0 -> 44.0.0
- POM: set scijava.jvm.version=21, Java21 javadoc URL, legacyMode=true
- POM: declare ome:turbojpeg at runtime scope so it stays off the
  compile/javadoc classpath (its default-package class breaks the
  JDK 9+ javadoc module step during release), matching
  multiview-reconstruction
- CI: build on Java 21 (jdk), bump checkout@v4 and setup-java@v4

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: StephanPreibisch

.github/workflows/build-main.yml

@@ -12,11 +12,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '21'
+          java-package: 'jdk'
           distribution: 'zulu'
           cache: 'maven'
       - name: Set up CI environment

.github/workflows/build-pr.yml

@@ -10,11 +10,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
+          java-version: '21'
+          java-package: 'jdk'
           distribution: 'zulu'
           cache: 'maven'
       - name: Set up CI environment

pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.scijava</groupId>
 		<artifactId>pom-scijava</artifactId>
-		<version>34.1.0</version>
+		<version>44.0.0</version>
 		<relativePath />
 	</parent>
 
@@ -115,6 +115,9 @@
 		<license.licenseName>gpl_v2</license.licenseName>
 		<license.copyrightOwners>Fiji developers.</license.copyrightOwners>
 		<license.projectName>Fiji distribution of ImageJ for the life sciences.</license.projectName>
+		<scijava.jvm.version>21</scijava.jvm.version>
+		<scijava.javadoc.url.java>https://javadoc.scijava.org/Java21/</scijava.javadoc.url.java>
+		<legacyMode>true</legacyMode> <!-- NB: Make javadoc less strict about Java module system. -->
 
 		<!-- NB: Deploy releases to the SciJava Maven repository. -->
 		<releaseProfiles>sign,deploy-to-scijava</releaseProfiles>
@@ -184,6 +187,17 @@
 			<artifactId>ome-xml</artifactId>
 		</dependency>
 
+		<!-- Pulled transitively (compile) via bio-formats. Re-declared at runtime scope so
+		     it stays available at runtime but is off the compile/javadoc classpath: its jar
+		     has a class in the default package, which the javadoc tool cannot place on the
+		     JDK 9+ module path ("Unable to derive module descriptor") during release. -->
+		<dependency>
+			<groupId>ome</groupId>
+			<artifactId>turbojpeg</artifactId>
+			<version>${bio-formats.version}</version>
+			<scope>runtime</scope>
+		</dependency>
+
 		<!-- Third party dependencies -->
 		<dependency>
 			<groupId>edu.mines</groupId>