okay that didn't work, back to old switch + using the java version placeholder.

Author: Evidentsinger14

pom.xml

@@ -23,8 +23,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>17</source>
-                    <target>17</target>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
                 </configuration>
             </plugin>
             <plugin>

src/main/java/dev/Ev1dent/HavenSpawners/Utilities/TabCompleter.java

@@ -18,20 +18,20 @@ public List<String> onTabComplete(CommandSender sender, Command command, String
         final List<String> completions = new ArrayList<>();
 
         switch (command.getName().toLowerCase()) {
-            case "givespawner" -> {
+            case "givespawner": {
                 switch (args.length) {
-                    case 1 -> {
+                    case 1 : {
                         return null;
                     }
-                    case 2 -> {
+                    case 2 : {
                         StringUtil.copyPartialMatches(args[1], HSMain.plugin.getConfig().getStringList("Mobs"), completions);
                         Collections.sort(completions);
                         return completions;
                     }
                 }
             }
-            case "havenspawners" -> {
 
+            case "havenspawners" :{
                 StringUtil.copyPartialMatches(args[0], Arrays.asList(hsArguments), completions);
                 Collections.sort(completions);
                 return completions;