try building for java 17

Author: JasperGeurtz

.github/workflows/maven.yml

@@ -8,15 +8,14 @@ on:
   - pull_request
 
 jobs:
-  build:
+  build_before_java16:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         java:
-         - '8'
-         - '11'
-         #- '17'
-    name: Java ${{ matrix.Java }} sample
+         - '8'  # 2030.12
+         - '11' # 2026.09
+    name: Build for Java ${{ matrix.Java }}
     steps:
       - uses: actions/checkout@v2
       - name: Setup java
@@ -26,3 +25,20 @@ jobs:
           java-version: ${{ matrix.java }}
       - name: Build with Maven
         run: mvn -B package --file pom.xml
+
+  build_after_java16:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java:
+          - '17' # 2029.09
+    name: Build for Java ${{ matrix.Java }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup java
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java }}
+      - name: Build with Maven
+        run: MAVEN_OPTS="--add-opens java.base/java.lang=ALL-UNNAMED" mvn -B package --file pom.xml