Upgraded to java 17

.github/workflows/gradle.yml

@@ -15,12 +15,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up JDK 11
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v2
       with:
+        distribution: 'zulu'
         java-version: 11
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle
-      run: ./gradlew build
+      run: ./gradlew clean build --warning-mode all

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=11.0.18-amzn
+java=17.0.3-oracle

Makefile

@@ -9,23 +9,23 @@ clean:
 pull:
 	git pull
 	git submodule update --init --recursive
-	git submodule foreach git checkout master
+	git submodule foreach git checkout main
 	git submodule foreach git pull
 
 .PHONY: build
 build:
-	./gradlew build
+	./gradlew build --warning-mode all
 
 build-fast:
-	./gradlew build -Pcheck=false -x test
+	./gradlew build -Pcheck=false -x test --warning-mode all
 
 release:
-	./gradlew release -Prelease.useAutomaticVersion=true
+	./gradlew release --warning-mode all
 
 publish: build
 	rm -rf $$HOME/.m2/repository/io/documentnode/epub4j-core
-	./gradlew publishToMavenLocal
+	./gradlew publishToMavenLocal --warning-mode all
 
 publish-remote: publish
-	./gradlew publishMavenJavaPublicationToMavenRepository
+	./gradlew publishMavenJavaPublicationToMavenRepository --warning-mode all
 

build.gradle

@@ -33,7 +33,7 @@ subprojects {
     mavenCentral()
   }
 
-  def javaVersion = JavaVersion.VERSION_11
+  def javaVersion = JavaVersion.VERSION_17
   java {
     toolchain {
       languageVersion = JavaLanguageVersion.of(javaVersion.toString())

epub4j-core/src/main/java/io/documentnode/epub4j/domain/Resource.java

@@ -91,7 +91,7 @@ public Resource(Reader in, String href) throws IOException {
    *
    * Assumes that if the data is of a text type (html/css/etc) then the encoding will be UTF-8
    *
-   * It is recommended to us the {@link #Resource(Reader, String)} method for creating textual
+   * It is recommended to use the {@code #Resource(Reader, String)} method for creating textual
    * (html/css/etc) resources to prevent encoding problems.
    * Use this method only for binary Resources like images, fonts, etc.
    *

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.11-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME