JDA Discord Bot Tutorial #02: Listeners

Main.java

// public class Main() {...

    //public static void main(String[] Args) {...}

    public static void addListeners() {
        builder.addListener(new readyListener());
        builder.addListener(new voiceListener());
    }

// }

readyListener.java

package listeners;

import net.dv8tion.jda.core.entities.Guild;
import net.dv8tion.jda.core.events.ReadyEvent;
import net.dv8tion.jda.core.hooks.ListenerAdapter;

/**
 * © zekro 2017
 *
 * @author zekro
 */

public class readyListener extends ListenerAdapter {

    public void onReady(ReadyEvent event) {

        String out = "\nThis bot is running on following servers: \n";

        for (Guild g : event.getJDA().getGuilds() ) {
            out += g.getName() + " (" + g.getId() + ") \n";
        }

        System.out.println(out);

        for (Guild g : event.getJDA().getGuilds() ) {
            g.getTextChannels().get(0).sendMessage(
                    "Hey guys! Im back again!"
            ).queue();
        }

    }

}

voiceListener.java

package listeners;

import net.dv8tion.jda.core.events.guild.voice.GuildVoiceJoinEvent;
import net.dv8tion.jda.core.hooks.ListenerAdapter;

/**
 * © zekro 2017
 *
 * @author zekro
 */

public class voiceListener extends ListenerAdapter {

    public void onGuildVoiceJoin(GuildVoiceJoinEvent event) {
        event.getGuild().getTextChannelsByName("voicelog", true).get(0).sendMessage(
                "Member " + event.getVoiceState().getMember().getUser().getName() + " joined voice channel " + event.getChannelJoined().getName() + "."
        ).queue();
    }

}