add errorprone and fix errors

app/build.gradle

@@ -9,6 +9,7 @@
 plugins {
     // Apply the application plugin to add support for building a CLI application in Java.
     id 'application'
+    id("net.ltgt.errorprone") version "3.1.0"
 }
 
 repositories {
@@ -17,6 +18,7 @@ repositories {
 }
 
 dependencies {
+    errorprone("com.google.errorprone:error_prone_core:2.24.1")
     implementation 'com.google.apis:google-api-services-youtube:v3-rev222-1.25.0'
 
     // Use JUnit test framework.
@@ -28,22 +30,8 @@ dependencies {
     implementation("com.google.guava:guava:33.0.0-jre")
 }
 
-task fatJar(type: Jar) {
-    manifest {
-        attributes 'Main-Class': 'Main'
-    }
-
-    from {
-        configurations.compile.collect {
-            dependency ->
-                if (dependency.directory) {
-                    return dependency
-                } else {
-                    return zipTree(dependency)
-                }
-        }
-    }
-    with jar
+tasks.withType(JavaCompile).configureEach {
+    options.errorprone.disableWarningsInGeneratedCode.set(false)
 }
 
 application {

app/src/main/java/musicbot/ButtonInteraction.java

@@ -14,7 +14,7 @@ public interface ButtonInteraction {
 
   /**
    * Executes the interaction logic of the button
-   * @param event
+   * @param event the ButtonInteractionEvent
    */
   void execute(ButtonInteractionEvent event);
 }

app/src/main/java/musicbot/ButtonInteractionManager.java

@@ -23,7 +23,7 @@ public class ButtonInteractionManager extends ListenerAdapter {
   public void onButtonInteraction(@NotNull ButtonInteractionEvent event) {
     final String id = event.getComponent().getId();
 
-    final String[] args = id.split("_");
+    final String[] args = id.split("_", 0);
 
     for (final ButtonInteraction buttonInteraction : buttonInteractions) {
       if (args[0].equals(buttonInteraction.getName())) {

app/src/main/java/musicbot/Paginator.java

@@ -45,7 +45,7 @@ public class Paginator {
     }
 
     final int maxSize = tracks.size();
-    final int maxPage = (int) Math.floor(maxSize / numItemsPerPage);
+    final int maxPage = Math.round(maxSize / ((float) numItemsPerPage));
     final int maxIndex = numItemsPerPage * pageNumber;
     final int baseIndex = maxIndex - numItemsPerPage;
     final int nextPage = pageNumber + 1;

app/src/main/java/musicbot/RecommendationService.java

@@ -1,18 +1,11 @@
 package musicbot;
 
 import com.google.common.collect.ImmutableList;
-import net.dv8tion.jda.api.EmbedBuilder;
-import net.dv8tion.jda.api.entities.MessageEmbed;
-import net.dv8tion.jda.api.interactions.commands.OptionMapping;
-import net.dv8tion.jda.api.interactions.components.buttons.Button;
 import se.michaelthelin.spotify.model_objects.specification.Artist;
-import se.michaelthelin.spotify.model_objects.specification.ArtistSimplified;
 import se.michaelthelin.spotify.model_objects.specification.Track;
 
-import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;
-import java.util.stream.Collectors;
 
 public class RecommendationService {
 

app/src/main/java/musicbot/SpotifyClient.java

@@ -3,7 +3,6 @@ package musicbot;
 import com.google.common.collect.ImmutableList;
 import org.apache.hc.core5.http.ParseException;
 import se.michaelthelin.spotify.SpotifyApi;
-import se.michaelthelin.spotify.enums.ModelObjectType;
 import se.michaelthelin.spotify.exceptions.SpotifyWebApiException;
 import se.michaelthelin.spotify.model_objects.credentials.ClientCredentials;
 import se.michaelthelin.spotify.model_objects.specification.Artist;
@@ -20,8 +19,6 @@ import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Optional;
-import java.util.stream.Collector;
-import java.util.stream.Collectors;
 
 public class SpotifyClient {
   private static final SpotifyApi SPOTIFY_API = new SpotifyApi.Builder()

app/src/main/java/musicbot/YoutubeSearch.java

@@ -48,6 +48,7 @@ public class YoutubeSearch {
 
   private HttpRequestInitializer createRequestInitializer() {
     final HttpRequestInitializer initializer = new HttpRequestInitializer() {
+      @Override
       public void initialize(HttpRequest request) throws IOException {
       }
     };

app/src/main/java/musicbot/buttonInteractions/MoreGenre.java

@@ -20,7 +20,7 @@ public class MoreGenre implements ButtonInteraction {
     final String id = event.getComponent().getId();
     final Paginator paginator = new Paginator();
 
-    final String[] args = id.split("_");
+    final String[] args = id.split("_", 0);
     event.deferReply().queue();
 
     final int page = Integer.parseInt(args[1]);

app/src/main/java/musicbot/buttonInteractions/MoreRecommendation.java

@@ -20,7 +20,6 @@ import java.util.stream.Collectors;
  * after initial /recommend.
  */
 public class MoreRecommendation implements ButtonInteraction {
-  private static final int INCREMENT = 5;
   private static final String ARGS_DELIMITER = "_";
   private static final String ARTIST_GENRE_DELIMITER = "--";
 
@@ -33,9 +32,9 @@ public class MoreRecommendation implements ButtonInteraction {
   public void execute(final ButtonInteractionEvent event) {
     event.deferReply().queue();
     final String id = event.getComponent().getId();
-    final String[] args = id.split(ARGS_DELIMITER);
+    final String[] args = id.split(ARGS_DELIMITER, 0);
 
-    final String[] artistGenre = args[1].split(ARTIST_GENRE_DELIMITER);
+    final String[] artistGenre = args[1].split(ARTIST_GENRE_DELIMITER, 0);
     final String artist = artistGenre[0];
     final String genre = artistGenre.length < 2 ? "" : artistGenre[1];
 

app/src/main/java/musicbot/buttonInteractions/VideoRecommendation.java

@@ -15,7 +15,7 @@ public class VideoRecommendation implements ButtonInteraction {
   public void execute(ButtonInteractionEvent event) {
     final String id = event.getComponent().getId();
     final String label = event.getComponent().getLabel();
-    final String[] args = id.split("_");
+    final String[] args = id.split("_", 0);
 
     event.deferReply().queue();
 

app/src/main/java/musicbot/commands/Genres.java

@@ -1,23 +1,16 @@
 package musicbot.commands;
 
-import com.google.common.collect.Lists;
 import musicbot.MCommand;
 import musicbot.Paginator;
 import musicbot.SpotifyClient;
 import net.dv8tion.jda.api.EmbedBuilder;
-import net.dv8tion.jda.api.entities.MessageEmbed;
 import net.dv8tion.jda.api.events.interaction.command.SlashCommandInteractionEvent;
-import net.dv8tion.jda.api.hooks.ListenerAdapter;
 import net.dv8tion.jda.api.interactions.commands.build.OptionData;
 import net.dv8tion.jda.api.interactions.components.buttons.Button;
-import org.jetbrains.annotations.NotNull;
 
-import java.util.ArrayList;
 import java.util.List;
-import java.util.stream.Collectors;
 
 public class Genres implements MCommand {
-
   @Override
   public String getName() {
     return "genres";