feat: java 25 and gradle 9.x upgrade

.github/workflows/build.yml

@@ -25,12 +25,18 @@ jobs:
           path: blue-quickjs
           submodules: recursive
 
-      - name: Set up JDK
+      - name: Set up Java 8 test runtime
         uses: actions/setup-java@v3
         with:
           java-version: '8'
           distribution: 'corretto'
 
+      - name: Set up JDK 25
+        uses: actions/setup-java@v3
+        with:
+          java-version: '25'
+          distribution: 'corretto'
+
       - name: Set up pnpm
         uses: pnpm/action-setup@v4
         with:

.github/workflows/release.yml

@@ -29,10 +29,16 @@ jobs:
           path: blue-quickjs
           submodules: recursive
 
-      - name: Set up JDK
+      - name: Set up Java 8 test runtime
         uses: actions/setup-java@v3
         with:
-          java-version: '17'
+          java-version: '8'
+          distribution: 'corretto'
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v3
+        with:
+          java-version: '25'
           distribution: 'corretto'
 
       - name: Set up pnpm

README.md

@@ -25,7 +25,8 @@ dependencies {
 }
 ```
 
-The project targets Java 8 bytecode and depends on:
+The project targets Java 8-compatible bytecode, builds with JDK 25, runs tests
+on Java 8, and depends on:
 
 ```groovy
 api "blue.language:blue-language-java:3.0.0"
@@ -200,6 +201,10 @@ Common workflow bindings:
 
 ## Build And Test
 
+Gradle runs on JDK 25 and uses a Java 8 toolchain for tests. If Java 8 is not
+installed locally, Gradle can provision it through the configured Foojay
+toolchain resolver.
+
 Run tests:
 
 ```bash

build.gradle

@@ -8,7 +8,7 @@ plugins {
     id 'java-library'
     id 'maven-publish'
     id 'signing'
-    id 'org.jreleaser' version '1.13.1'
+    id 'org.jreleaser' version '1.24.0'
 }
 
 group = 'blue.coordination'
@@ -28,16 +28,13 @@ repositories {
 java {
     withSourcesJar()
     withJavadocJar()
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
-
 tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8'
-    if (JavaVersion.current().isJava9Compatible()) {
-        options.release = 8
-    }
+    options.release = 8
 }
 
 dependencies {
@@ -59,6 +56,9 @@ compileTestJava {
 }
 
 test {
+    javaLauncher = javaToolchains.launcherFor {
+        languageVersion = JavaLanguageVersion.of(8)
+    }
     useJUnitPlatform()
     reports {
         junitXml.required = false

gradle.properties

@@ -0,0 +1,2 @@
+org.gradle.java.installations.auto-download=true
+org.gradle.java.installations.fromEnv=JAVA_HOME_8_X64,JAVA_HOME_8_ARM64,JAVA8_HOME

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,9 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.0-bin.zip
 networkTimeout=10000
+retries=0
+retryBackOffMs=500
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
+}
+
 rootProject.name = 'blue-coordination-java'
 
 def localBlueRepository = file('../blue-repository-java')