Use JDK 21 for release (#962)

.github/workflows/publish-release.yml

@@ -16,12 +16,12 @@ jobs:
  steps:
  - uses: actions/checkout@v3
 
- - id: setup-jdk-17
- name: Set up JDK 17
+ - id: setup-jdk-21
+ name: Set up JDK 21
  uses: actions/setup-java@v3
  with:
  distribution: 'temurin'
- java-version: '17'
+ java-version: '21'
 
  - name: Setup Gradle
  uses: gradle/gradle-build-action@v2

.github/workflows/publish-site.yml

@@ -19,12 +19,12 @@ jobs:
  run: |
  sudo apt-get -y install graphviz
 
- - id: setup-jdk-17
- name: Set up JDK 17
+ - id: setup-jdk-21
+ name: Set up JDK 21
  uses: actions/setup-java@v3
  with:
  distribution: 'temurin'
- java-version: '17'
+ java-version: '21'
 
  - name: Setup Gradle
  uses: gradle/gradle-build-action@v2

.github/workflows/tag-new-release.yml

@@ -49,12 +49,12 @@ jobs:
  git_user_signingkey: true
  git_commit_gpgsign: true
 
- - id: setup-jdk-17
- name: Set up JDK 17
+ - id: setup-jdk-21
+ name: Set up JDK 21
  uses: actions/setup-java@v3
  with:
  distribution: 'temurin'
- java-version: '17'
+ java-version: '21'
 
  - name: Set up Gradle
  uses: gradle/gradle-build-action@v2

build.gradle

@@ -141,6 +141,6 @@ allprojects {
 // Require to use JDK 21 when releasing.
 tasks.release.doFirst {
  if (JavaVersion.current() != JavaVersion.VERSION_21) {
- throw new IllegalStateException("You must release using JDK 17.")
+ throw new IllegalStateException("You must release using JDK 21. Current: ${JavaVersion.current()}")
  }
 }