Support for Java 20 (#939)

Author: nakamura-to

.github/workflows/ci.yml

@@ -24,15 +24,15 @@ jobs:
         shell: bash
         run: echo "JDK8=$JAVA_HOME" >> $GITHUB_ENV
 
-      - name: Set up JDK 19
+      - name: Set up JDK 20
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 19
+          java-version: 20
 
-      - name: Prepare JDK19 env var
+      - name: Prepare JDK20 env var
         shell: bash
-        run: echo "JDK19=$JAVA_HOME" >> $GITHUB_ENV
+        run: echo "JDK20=$JAVA_HOME" >> $GITHUB_ENV
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3
@@ -74,15 +74,15 @@ jobs:
         shell: bash
         run: echo "JDK8=$JAVA_HOME" >> $GITHUB_ENV
 
-      - name: Set up JDK 19
+      - name: Set up JDK 20
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 19
+          java-version: 20
 
-      - name: Prepare JDK19 env var
+      - name: Prepare JDK20 env var
         shell: bash
-        run: echo "JDK19=$JAVA_HOME" >> $GITHUB_ENV
+        run: echo "JDK20=$JAVA_HOME" >> $GITHUB_ENV
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3
@@ -114,12 +114,12 @@ jobs:
             integration-test-java:test
             integration-test-java-additional:test
 
-      - name: Test with Java 19 using JPMS
+      - name: Test with Java 20 using JPMS
         uses: gradle/gradle-build-action@v2
         with:
           arguments: |
             -Pdriver=${{ matrix.driver }}
-            -PtestJavaLangVersion=19
+            -PtestJavaLangVersion=20
             -PtestUseModule=true
             javaToolchains
             integration-test-java:test
@@ -150,15 +150,15 @@ jobs:
         shell: bash
         run: echo "JDK8=$JAVA_HOME" >> $GITHUB_ENV
 
-      - name: Set up JDK 19
+      - name: Set up JDK 20
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: 19
+          java-version: 20
 
-      - name: Prepare JDK19 env var
+      - name: Prepare JDK20 env var
         shell: bash
-        run: echo "JDK19=$JAVA_HOME" >> $GITHUB_ENV
+        run: echo "JDK20=$JAVA_HOME" >> $GITHUB_ENV
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3

README.md

@@ -204,6 +204,7 @@ Major versions
 | Java 17 |        | v      |
 | Java 18 |        | v      |
 | Java 19 |        | v      |
+| Java 20 |        | v      |
 
 Backers & Sponsors
 ------------------

gradle.properties

@@ -8,7 +8,7 @@ sonatypePassword=
 release.useAutomaticVersion=true
 
 org.gradle.caching=true
-org.gradle.java.installations.fromEnv=JDK8,JDK19
+org.gradle.java.installations.fromEnv=JDK8,JDK20
 # https://github.com/diffplug/spotless/issues/834
 org.gradle.jvmargs=-Dfile.encoding=UTF-8