Fixes

Author: brianluisgomez

.github/workflows/maven.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '8' ]
+        java: [ '8', '11', '15', '17' ]
     steps:
     - uses: actions/checkout@v2
     - name: Set up JDK

.settings/org.eclipse.jdt.core.prefs

@@ -42,9 +42,9 @@ org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.lambda.genericSignature=do not generate
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
 org.eclipse.jdt.core.compiler.codegen.shareCommonFinallyBlocks=disabled
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=19
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=15
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=19
+org.eclipse.jdt.core.compiler.compliance=15
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -169,7 +169,7 @@ org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.processAnnotations=enabled
 org.eclipse.jdt.core.compiler.release=disabled
-org.eclipse.jdt.core.compiler.source=19
+org.eclipse.jdt.core.compiler.source=15
 org.eclipse.jdt.core.compiler.storeAnnotations=disabled
 org.eclipse.jdt.core.compiler.taskCaseSensitive=enabled
 org.eclipse.jdt.core.compiler.taskPriorities=NORMAL,HIGH,NORMAL

pom.xml

@@ -361,7 +361,7 @@
         </dependency>
     </dependencies>
     <properties>
-        <java.version>19</java.version>
+        <java.version>15</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <gson-fire-version>1.8.5</gson-fire-version>