Require Java 17

.github/workflows/pull-request.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '11', '17', '21', '25' ]
+        java: [ '17', '21', '25' ]
     steps:
       - name: Checkout
         uses: actions/checkout@v7

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Setup java
         uses: actions/setup-java@v6
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
       - name: Build with Maven
         run: mvn --batch-mode --update-snapshots verify
@@ -33,7 +33,7 @@ jobs:
       - name: Setup Maven Central
         uses: actions/setup-java@v6
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
           server-id: central
           server-username: MAVEN_USERNAME

.github/workflows/snapshot.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup java
         uses: actions/setup-java@v6
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
       - name: Build with Maven
         run: mvn --batch-mode --update-snapshots verify
@@ -26,7 +26,7 @@ jobs:
       - name: Setup Maven Central
         uses: actions/setup-java@v6
         with:
-          java-version: '11'
+          java-version: '17'
           distribution: 'temurin'
           server-id: central
           server-username: MAVEN_USERNAME

pom.xml

@@ -13,7 +13,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <java.version>11</java.version>
+        <java.version>17</java.version>
         <kotlin.version>2.3.10</kotlin.version>
         <kotlin-coroutines.version>1.11.0</kotlin-coroutines.version>
         <jackson.version>2.22.4</jackson.version>
@@ -253,6 +253,7 @@
                 <groupId>org.jetbrains.kotlin</groupId>
                 <version>${kotlin.version}</version>
                 <configuration>
+                    <jvmTarget>${java.version}</jvmTarget>
                     <args>
                         <arg>-Werror</arg>
                     </args>
@@ -282,21 +283,9 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.16.0</version>
                 <configuration>
-                    <release>11</release>
+                    <release>17</release>
                     <failOnWarning>true</failOnWarning>
                 </configuration>
-                <executions>
-                    <execution>
-                        <!-- With release, javac before Java 16 ignores the module descriptors of multi-release jars, so Java tests
-                        compiled into the module can't see Jackson's annotations or java.beans. They compile on the class path
-                        like the Kotlin tests instead -->
-                        <!-- TODO compile the Java tests on the module path again in 15.0.0 -->
-                        <id>default-testCompile</id>
-                        <configuration>
-                            <useModulePath>false</useModulePath>
-                        </configuration>
-                    </execution>
-                </executions>
             </plugin>
 
             <plugin>
@@ -363,34 +352,6 @@
     </build>
 
     <profiles>
-        <profile>
-            <id>java17-tests</id>
-            <activation>
-                <jdk>[17,)</jdk>
-            </activation>
-            <build>
-                <plugins>
-                    <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
-                        <artifactId>maven-compiler-plugin</artifactId>
-                        <executions>
-                            <execution>
-                                <id>java17-test-compile</id>
-                                <goals>
-                                    <goal>testCompile</goal>
-                                </goals>
-                                <configuration>
-                                    <compileSourceRoots>
-                                        <compileSourceRoot>${project.basedir}/src/test/java17</compileSourceRoot>
-                                    </compileSourceRoots>
-                                    <release>17</release>
-                                </configuration>
-                            </execution>
-                        </executions>
-                    </plugin>
-                </plugins>
-            </build>
-        </profile>
         <profile>
             <id>release</id>
             <build>