Upgrade to JDK 27

.github/workflows/ci.yml

@@ -15,8 +15,8 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
-          distribution: oracle
-          java-version: '26'
+          distribution: liberica
+          java-version: '27'
       - uses: gradle/actions/setup-gradle@v5
       - name: Build, test, and verify publications
         run: ./gradlew clean build publishToMavenLocal

.github/workflows/publish.yml

@@ -20,8 +20,8 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-java@v5
         with:
-          distribution: temurin
-          java-version: '26'
+          distribution: liberica
+          java-version: '27'
       - uses: gradle/actions/setup-gradle@v5
       - name: Check release version
         run: |

README.md

@@ -1,6 +1,6 @@
 # Brev
 
-**Current Peppol, as one modular JDK 26 library.**
+**Current Peppol, as one modular JDK 27 library.**
 
 Brev is a dependency-free JVM library for constructing, writing, reading, and
 later transporting current Peppol business documents. It lives in **one
@@ -23,7 +23,7 @@ Brev occupies the opposite corner:
 
 - one repo, independently published modules;
 - current Peppol only;
-- JDK 26 baseline, no older-Java tax;
+- JDK 27 baseline, no older-Java tax;
 - typed documents instead of the full UBL schema;
 - zero third-party runtime dependencies in every published module.
 
@@ -91,7 +91,7 @@ Unsupported Peppol Billing features fail through the absence of an API.
 
 ## Building
 
-Brev requires JDK 26.
+Brev requires JDK 27.
 
 ```shell
 ./gradlew clean build

build.gradle.kts

@@ -33,7 +33,7 @@ allprojects {
 subprojects {
     plugins.withId("java") {
         extensions.configure<JavaPluginExtension> {
-            toolchain.languageVersion.set(JavaLanguageVersion.of(26))
+            toolchain.languageVersion.set(JavaLanguageVersion.of(27))
         }
 
         dependencies {
@@ -43,7 +43,7 @@ subprojects {
         }
 
         tasks.withType<JavaCompile>().configureEach {
-            options.release.set(26)
+            options.release.set(27)
             options.compilerArgs.addAll(listOf("-Xlint:all", "-Werror"))
         }