src/main/java/com/bbn/hadder/Hadder.java

@@ -1,5 +1,6 @@
 package com.bbn.hadder;
 
+import com.bbn.hadder.listener.MentionListener;
 import net.dv8tion.jda.api.sharding.DefaultShardManagerBuilder;
 import net.dv8tion.jda.api.sharding.ShardManager;
 import org.json.JSONObject;
@@ -32,6 +33,8 @@ public class Hadder {
         builder.setShardsTotal(1);
         builder.setToken(config.getString("Token"));
 
+        builder.addEventListeners(new MentionListener());
+
         try {
             ShardManager shardManager = builder.build();
         } catch (LoginException e) {

src/main/java/com/bbn/hadder/MessageEditor.java

@@ -0,0 +1,32 @@
+package com.bbn.hadder;
+
+import net.dv8tion.jda.api.EmbedBuilder;
+
+import java.awt.*;
+
+public class MessageEditor {
+
+    public EmbedBuilder setDefaultSettings(Messagetype type, EmbedBuilder embedBuilder) {
+        switch (type) {
+            case INFO:
+                embedBuilder.setColor(new Color(47,94,105));
+                break;
+
+            case ERROR:
+                embedBuilder.setColor(Color.RED);
+                break;
+
+            case WARNING:
+                embedBuilder.setColor(Color.ORANGE);
+                break;
+        }
+        return embedBuilder;
+    }
+
+    public enum Messagetype {
+        ERROR,
+        WARNING,
+        INFO
+    }
+
+}

src/main/java/com/bbn/hadder/listener/MentionListener.java

@@ -0,0 +1,23 @@
+package com.bbn.hadder.listener;
+
+import com.bbn.hadder.MessageEditor;
+import net.dv8tion.jda.api.EmbedBuilder;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+
+import javax.annotation.Nonnull;
+
+public class MentionListener extends ListenerAdapter {
+
+    @Override
+    public void onMessageReceived(@Nonnull MessageReceivedEvent event) {
+        if (event.getMessage().getContentRaw().equals(event.getJDA().getSelfUser().getAsMention())) {
+            EmbedBuilder builder = new EmbedBuilder()
+                    .setTitle("Hello I'm Hadder.")
+                    .setAuthor(event.getJDA().getSelfUser().getName(), event.getJDA().getSelfUser().getAvatarUrl(), event.getJDA().getSelfUser().getAvatarUrl())
+                    .addField("Users", String.valueOf(event.getJDA().getUsers().size()), false)
+                    .addField("Guilds", String.valueOf(event.getJDA().getGuilds().size()), false);
+            event.getChannel().sendMessage(new MessageEditor().setDefaultSettings(MessageEditor.Messagetype.INFO, builder).build()).queue();
+        }
+    }
+}