Build with Java 21 (#570)

Author: joschi

.github/workflows/maven.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: ['8', '11', '17']
+        java_version: ['8', '11', '17', '21']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
@@ -39,7 +39,7 @@ jobs:
         server-password: OSS_PASSWORD
     - name: Cache SonarCloud packages
       uses: actions/cache@v3
-      if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
+      if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '17' }}
       env:
         SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
       with:
@@ -49,7 +49,7 @@ jobs:
     - name: Run tests
       run: ./mvnw -V -B -ntp -ff verify jacoco:report
     - name: Static Analysis (Sonar)
-      if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
+      if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '17' }}
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/pr.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        java_version: ['8', '11', '17']
+        java_version: ['8', '11', '17', '21']
     env:
       JAVA_OPTS: "-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
     steps:
@@ -30,7 +30,7 @@ jobs:
           cache: 'maven'
       - name: Cache SonarCloud packages
         uses: actions/cache@v3
-        if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
+        if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '17' }}
         env:
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
         with:
@@ -40,7 +40,7 @@ jobs:
       - name: Run tests
         run: ./mvnw -V -B -ntp -ff verify
       - name: Static Analysis (Sonar)
-        if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '11' }}
+        if: ${{ env.SONAR_TOKEN != null && env.SONAR_TOKEN != '' && matrix.java_version == '17' }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}