Fix bugs checked in SpotBugs

build.gradle

@@ -155,6 +155,9 @@ subprojects {
     }
 
     compileJava {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+
         source = sourcesForRelease.destinationDir
         classpath = sourceSets.main.compileClasspath
 

command/src/main/java/com/jagrosh/jdautilities/command/CommandBuilder.java

@@ -19,8 +19,9 @@
 
 import net.dv8tion.jda.api.Permission;
 
+import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedList;
+import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 
@@ -50,8 +51,8 @@ public class CommandBuilder
     private int cooldown = 0;
     private Permission[] userPermissions = new Permission[0];
     private Permission[] botPermissions = new Permission[0];
-    private final LinkedList<String> aliases = new LinkedList<>();
-    private final LinkedList<Command> children = new LinkedList<>();
+    private final List<String> aliases = new ArrayList<>();
+    private final List<Command> children = new ArrayList<>();
     private BiConsumer<CommandEvent, Command> helpBiConsumer = null;
     private boolean usesTopicTags = true;
     private CooldownScope cooldownScope = CooldownScope.USER;
@@ -215,7 +216,7 @@ public CommandBuilder setUserPermissions(Collection<Permission> userPermissions)
         if(userPermissions == null)
             this.userPermissions = new Permission[0];
         else
-            this.userPermissions = (Permission[]) userPermissions.toArray();
+            this.userPermissions = userPermissions.toArray(new Permission[0]);
         return this;
     }
 
@@ -251,7 +252,7 @@ public CommandBuilder setBotPermissions(Collection<Permission> botPermissions)
         if(botPermissions == null)
             this.botPermissions = new Permission[0];
         else
-            this.botPermissions = (Permission[]) botPermissions.toArray();
+            this.botPermissions = botPermissions.toArray(new Permission[0]);
         return this;
     }
 
@@ -490,8 +491,8 @@ public Command build(BiConsumer<Command,CommandEvent> execution)
     {
         return new BlankCommand(name, help, category, arguments,
                 guildOnly, requiredRole, ownerCommand, cooldown,
-                userPermissions, botPermissions, aliases.toArray(new String[aliases.size()]),
-                children.toArray(new Command[children.size()]), helpBiConsumer, usesTopicTags,
+                userPermissions, botPermissions, aliases.toArray(new String[0]),
+                children.toArray(new Command[0]), helpBiConsumer, usesTopicTags,
                 cooldownScope, hidden)
         {
             @Override
@@ -502,7 +503,7 @@ protected void execute(CommandEvent event)
         };
     }
 
-    private abstract class BlankCommand extends Command
+    private abstract static class BlankCommand extends Command
     {
         BlankCommand(String name, String help, Category category,
                      String arguments, boolean guildOnly, String requiredRole,

command/src/main/java/com/jagrosh/jdautilities/command/CommandClient.java

@@ -593,7 +593,7 @@ public interface CommandClient
      *
      * @return The GuildSettingsManager, or {@code null} if one was not provided when building this CommandClient.
      */
-    <M extends GuildSettingsManager> M getSettingsManager();
+    <M extends GuildSettingsManager<?>> M getSettingsManager();
 
     /**
      * Shuts down internals of the Command Client, such as the threadpool and guild settings manager

command/src/main/java/com/jagrosh/jdautilities/command/CommandClientBuilder.java

@@ -17,7 +17,7 @@
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.LinkedList;
+import java.util.List;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
 
@@ -58,9 +58,9 @@ public class CommandClientBuilder
     private String error;
     private String carbonKey;
     private String botsKey;
-    private final LinkedList<Command> commands = new LinkedList<>();
-    private final LinkedList<SlashCommand> slashCommands = new LinkedList<>();
-    private final LinkedList<ContextMenu> contextMenus = new LinkedList<>();
+    private final List<Command> commands = new ArrayList<>();
+    private final List<SlashCommand> slashCommands = new ArrayList<>();
+    private final List<ContextMenu> contextMenus = new ArrayList<>();
     private String forcedGuildId = null;
     private boolean manualUpsert = false;
     private CommandListener listener;
@@ -71,7 +71,7 @@ public class CommandClientBuilder
     private ScheduledExecutorService executor;
     private int linkedCacheSize = 0;
     private AnnotatedModuleCompiler compiler = new AnnotatedModuleCompilerImpl();
-    private GuildSettingsManager manager = null;
+    private GuildSettingsManager<?> manager = null;
 
     /**
      * Builds a {@link com.jagrosh.jdautilities.command.impl.CommandClientImpl CommandClientImpl}
@@ -707,7 +707,7 @@ public CommandClientBuilder setLinkedCacheSize(int linkedCacheSize)
      *
      * @return This builder
      */
-    public CommandClientBuilder setGuildSettingsManager(GuildSettingsManager manager)
+    public CommandClientBuilder setGuildSettingsManager(GuildSettingsManager<?> manager)
     {
         this.manager = manager;
         return this;

command/src/main/java/com/jagrosh/jdautilities/command/impl/CommandClientImpl.java

@@ -142,7 +142,7 @@ public class CommandClientImpl implements CommandClient, EventListener
     private final String helpWord;
     private final ScheduledExecutorService executor;
     private final AnnotatedModuleCompiler compiler;
-    private final GuildSettingsManager manager;
+    private final GuildSettingsManager<?> manager;
 
     private String textPrefix;
     private CommandListener listener = null;
@@ -151,7 +151,7 @@ public class CommandClientImpl implements CommandClient, EventListener
     public CommandClientImpl(String ownerId, String[] coOwnerIds, String prefix, String altprefix, String[] prefixes, Function<MessageReceivedEvent, String> prefixFunction, Function<MessageReceivedEvent, Boolean> commandPreProcessFunction, BiFunction<MessageReceivedEvent, Command, Boolean> commandPreProcessBiFunction, Activity activity, OnlineStatus status, String serverInvite,
                              String success, String warning, String error, String carbonKey, String botsKey, ArrayList<Command> commands, ArrayList<SlashCommand> slashCommands, ArrayList<ContextMenu> contextMenus, String forcedGuildId, boolean manualUpsert,
                              boolean useHelp, boolean shutdownAutomatically, Consumer<CommandEvent> helpConsumer, String helpWord, ScheduledExecutorService executor,
-                             int linkedCacheSize, AnnotatedModuleCompiler compiler, GuildSettingsManager manager)
+                             int linkedCacheSize, AnnotatedModuleCompiler compiler, GuildSettingsManager<?> manager)
     {
         Checks.check(ownerId != null, "Owner ID was set null or not set! Please provide an User ID to register as the owner!");
 
@@ -602,7 +602,7 @@ public <S> S getSettingsFor(Guild guild)
 
     @SuppressWarnings("unchecked")
     @Override
-    public <M extends GuildSettingsManager> M getSettingsManager()
+    public <M extends GuildSettingsManager<?>> M getSettingsManager()
     {
         return (M) manager;
     }

commons/src/main/java/com/jagrosh/jdautilities/commons/waiter/EventWaiter.java

@@ -234,7 +234,7 @@ public <T extends Event> void waitForEvent(Class<T> classType, Predicate<T> cond
     @SuppressWarnings("unchecked")
     public final void onEvent(GenericEvent event)
     {
-        Class c = event.getClass();
+        Class<?> c = event.getClass();
 
         // Runs at least once for the fired Event, at most
         // once for each superclass (excluding Object) because
@@ -275,7 +275,7 @@ public void shutdown()
         threadpool.shutdown();
     }
 
-    private class WaitingEvent<T extends GenericEvent>
+    private static class WaitingEvent<T extends GenericEvent>
     {
         final Predicate<T> condition;
         final Consumer<T> action;

examples/src/main/java/com/jagrosh/jdautilities/examples/command/RoleinfoCommand.java

@@ -108,11 +108,11 @@ else if(found.size()>1)
 
     private static String listOfRoles(List<Role> list, String query)
     {
-        String out = String.format("**Multiple roles found matching \"%s\":**", query);
+        StringBuilder out = new StringBuilder(String.format("**Multiple roles found matching \"%s\":**", query));
         for(int i = 0; i < 6 && i < list.size(); i++)
-            out += "\n - " + list.get(i).getName() + " (ID:" + list.get(i).getId() + ")";
+            out.append("\n - ").append(list.get(i).getName()).append(" (ID:").append(list.get(i).getId()).append(")");
         if(list.size() > 6)
-            out += "\n**And " + (list.size() - 6) + " more...**";
-        return out;
+            out.append("\n**And ").append(list.size() - 6).append(" more...**");
+        return out.toString();
     }
 }

menu/src/main/java/com/jagrosh/jdautilities/menu/ButtonEmbedPaginator.java

@@ -36,7 +36,6 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.LinkedList;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -261,7 +260,7 @@ public static class Builder extends Menu.Builder<Builder, ButtonEmbedPaginator>
         private boolean wrapPageEnds = false;
         private ButtonStyle style = ButtonStyle.SECONDARY;
 
-        private final List<MessageEmbed> embeds = new LinkedList<>();
+        private final List<MessageEmbed> embeds = new ArrayList<>();
 
         /**
          * Builds the {@link ButtonEmbedPaginator} with this Builder.

menu/src/main/java/com/jagrosh/jdautilities/menu/ButtonMenu.java

@@ -30,7 +30,7 @@
 import net.dv8tion.jda.internal.utils.Checks;
 
 import java.awt.Color;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -113,34 +113,32 @@ private void initialize(RestAction<Message> ra)
                 else
                 {
                     // This is the last reaction added.
-                    r.queue(v -> {
-                        waiter.waitForEvent(MessageReactionAddEvent.class, event -> {
-                            // If the message is not the same as the ButtonMenu
-                            // currently being displayed.
-                            if(!event.getMessageId().equals(m.getId()))
-                                return false;
+                    r.queue(v -> waiter.waitForEvent(MessageReactionAddEvent.class, event -> {
+                        // If the message is not the same as the ButtonMenu
+                        // currently being displayed.
+                        if(!event.getMessageId().equals(m.getId()))
+                            return false;
 
-                            // If the reaction is an Emote we get the Snowflake,
-                            // otherwise we get the unicode value.
-                            String re = event.getReaction().getEmoji().getName();
+                        // If the reaction is an Emote we get the Snowflake,
+                        // otherwise we get the unicode value.
+                        String re = event.getReaction().getEmoji().getName();
 
-                            // If the value we got is not registered as a button to
-                            // the ButtonMenu being displayed we return false.
-                            if(!choices.contains(re))
-                                return false;
+                        // If the value we got is not registered as a button to
+                        // the ButtonMenu being displayed we return false.
+                        if(!choices.contains(re))
+                            return false;
 
-                            // Last check is that the person who added the reaction
-                            // is a valid user.
-                            return isValidUser(event.getUser(), event.isFromGuild() ? event.getGuild() : null);
-                        }, (MessageReactionAddEvent event) -> {
-                            // What happens next is after a valid event
-                            // is fired and processed above.
+                        // Last check is that the person who added the reaction
+                        // is a valid user.
+                        return isValidUser(event.getUser(), event.isFromGuild() ? event.getGuild() : null);
+                    }, (MessageReactionAddEvent event) -> {
+                        // What happens next is after a valid event
+                        // is fired and processed above.
 
-                            // Preform the specified action with the ReactionEmote
-                            action.accept(event.getReaction().getEmoji());
-                            finalAction.accept(m);
-                        }, timeout, unit, () -> finalAction.accept(m));
-                    });
+                        // Preform the specified action with the ReactionEmote
+                        action.accept(event.getReaction().getEmoji());
+                        finalAction.accept(m);
+                    }, timeout, unit, () -> finalAction.accept(m)));
                 }
             }
         });
@@ -168,7 +166,7 @@ public static class Builder extends Menu.Builder<Builder, ButtonMenu>
         private Color color;
         private String text;
         private String description;
-        private final List<String> choices = new LinkedList<>();
+        private final List<String> choices = new ArrayList<>();
         private Consumer<Emoji> action;
         private Consumer<Message> finalAction = (m) -> {};
 

menu/src/main/java/com/jagrosh/jdautilities/menu/EmbedPaginator.java

@@ -219,9 +219,9 @@ else if(event instanceof MessageReceivedEvent)
                 int pages = embeds.size();
                 final int targetPage;
 
-                if(leftText != null && rawContent.equalsIgnoreCase(leftText) && (1 < pageNum || wrapPageEnds))
-                    targetPage = pageNum - 1 < 1 && wrapPageEnds ? pages : pageNum - 1;
-                else if(rightText != null && rawContent.equalsIgnoreCase(rightText) && (pageNum < pages || wrapPageEnds))
+                if(rawContent.equalsIgnoreCase(leftText) && (1 < pageNum || wrapPageEnds))
+                    targetPage = pageNum - 1 < 1 ? pages : pageNum - 1;
+                else if(rawContent.equalsIgnoreCase(rightText) && (pageNum < pages || wrapPageEnds))
                     targetPage = pageNum + 1 > pages && wrapPageEnds ? 1 : pageNum + 1;
                 else
                     targetPage = Integer.parseInt(rawContent);

menu/src/main/java/com/jagrosh/jdautilities/menu/OrderedMenu.java

@@ -16,7 +16,7 @@
 package com.jagrosh.jdautilities.menu;
 
 import java.awt.Color;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Set;
@@ -249,9 +249,7 @@ else if (e instanceof MessageReceivedEvent)
     private void waitReactionOnly(Message m)
     {
         // This one is only for reactions
-        waiter.waitForEvent(MessageReactionAddEvent.class, e -> {
-            return isValidReaction(m, e);
-        }, e -> {
+        waiter.waitForEvent(MessageReactionAddEvent.class, e -> isValidReaction(m, e), e -> {
             m.delete().queue();
             if(e.getReaction().getEmoji().getName().equals(CANCEL))
                 cancel.accept(m);
@@ -273,7 +271,7 @@ private MessageEditData getMessage()
         for(int i=0; i<choices.size(); i++)
             sb.append("\n").append(getEmoji(i)).append(" ").append(choices.get(i));
         mbuilder.setEmbeds(new EmbedBuilder().setColor(color)
-                .setDescription(description==null ? sb.toString() : description+sb.toString()).build());
+                .setDescription(description==null ? sb.toString() : description+ sb).build());
         return mbuilder.build();
     }
 
@@ -349,7 +347,7 @@ public static class Builder extends Menu.Builder<Builder, OrderedMenu>
         private Color color;
         private String text;
         private String description;
-        private final List<String> choices = new LinkedList<>();
+        private final List<String> choices = new ArrayList<>();
         private BiConsumer<Message, Integer> selection;
         private Consumer<Message> cancel = (m) -> {};
         private boolean useLetters = false;

menu/src/main/java/com/jagrosh/jdautilities/menu/Paginator.java

@@ -17,7 +17,7 @@
 
 import java.awt.Color;
 import java.util.Arrays;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -259,9 +259,9 @@ else if(event instanceof MessageReceivedEvent)
 
                 final int targetPage;
 
-                if(leftText != null && rawContent.equalsIgnoreCase(leftText) && (1 < pageNum || wrapPageEnds))
-                    targetPage = pageNum - 1 < 1 && wrapPageEnds? pages : pageNum - 1;
-                else if(rightText != null && rawContent.equalsIgnoreCase(rightText) && (pageNum < pages || wrapPageEnds))
+                if(rawContent.equalsIgnoreCase(leftText) && (1 < pageNum || wrapPageEnds))
+                    targetPage = pageNum - 1 < 1 ? pages : pageNum - 1;
+                else if(rawContent.equalsIgnoreCase(rightText) && (pageNum < pages || wrapPageEnds))
                     targetPage = pageNum + 1 > pages && wrapPageEnds? 1 : pageNum + 1;
                 else
                 {
@@ -416,7 +416,7 @@ public static class Builder extends Menu.Builder<Builder, Paginator>
         private String textToRight = null;
         private boolean allowTextInput = false;
 
-        private final List<String> strings = new LinkedList<>();
+        private final List<String> strings = new ArrayList<>();
 
         /**
          * Builds the {@link com.jagrosh.jdautilities.menu.Paginator Paginator}

menu/src/main/java/com/jagrosh/jdautilities/menu/SelectionDialog.java

@@ -17,7 +17,7 @@
 
 import java.awt.Color;
 import java.util.Arrays;
-import java.util.LinkedList;
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
@@ -252,7 +252,7 @@ private MessageEditData render(int selection)
      */
     public static class Builder extends Menu.Builder<Builder, SelectionDialog>
     {
-        private final List<String> choices = new LinkedList<>();
+        private final List<String> choices = new ArrayList<>();
         private String leftEnd = "";
         private String rightEnd  = "";
         private String defaultLeft = "";