update to java 21

.github/workflows/main.yml

@@ -9,14 +9,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
         with:
-          java-version: '20'
+          java-version: '21'
           distribution: 'temurin'
-      - uses: gradle/gradle-build-action@v2
+      - uses: gradle/gradle-build-action@v3
         with:
-          gradle-version: 8.3
+          gradle-version: 8.7
       - run: ./gradlew checkstyleMain
       - run: ./gradlew test
       # - name: Publish code coverage

build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
     application
     jacoco
     id("checkstyle")
-    id("io.freefair.lombok") version "8.4"
+    id("io.freefair.lombok") version "8.6"
     id("com.github.ben-manes.versions") version "0.50.0"
     id("com.github.johnrengelman.shadow") version "8.1.1"
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew.bat

@@ -43,11 +43,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +57,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail