Recording command

package net.unidentifiedgaming.discord.bot.commands;

import com.sun.media.sound.WaveFileWriter;
import sx.blah.discord.handle.audio.IAudioReceiver;
import sx.blah.discord.handle.impl.events.guild.channel.message.MessageEvent;
import sx.blah.discord.handle.obj.IRole;
import sx.blah.discord.handle.obj.IUser;
import sx.blah.discord.handle.obj.IVoiceChannel;

import javax.sound.sampled.*;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.util.Date;
import java.util.List;

public class RecordingCommand extends Command implements IAudioReceiver {
    private static boolean recording = false;
    public RecordingCommand(List<IRole> permissions, String helpText) {
        super(permissions, helpText);
    }

    @Override
    public boolean action(List<String> args, MessageEvent event) {
        String arg1 = args.remove(0);
        if (arg1.equals("start")) {
            if (recording) {
                helpText = "I'm already recording in " + event.getClient().getOurUser().getVoiceStateForGuild(event.getGuild()).getChannel().getName() + ".";
                return false;
            }
            IVoiceChannel userVoiceChannel = event.getAuthor().getVoiceStateForGuild(event.getGuild()).getChannel();
            if (userVoiceChannel == null) {
                helpText = "You need to be in a voice channel to do that.";
                return false;
            }
            userVoiceChannel.join();

            event.getClient().changePlayingText("Recording!");
            recording = true;

            event.getGuild().getAudioManager().subscribeReceiver(this);
            event.getMessage().reply("I have started recording!");
            return true;
        } else if (arg1.equals("stop")) {
            if (!recording) {
                helpText = "I'm not recording!";
                return false;
            }
            event.getGuild().getAudioManager().unsubscribeReceiver(this);
            event.getClient().changePlayingText("");
            event.getClient().getOurUser().getVoiceStateForGuild(event.getGuild()).getChannel().leave();
            recording = false;
            event.getMessage().reply("I have stopped recording!");
            return true;
        }

        return false;
    }

    @Override
    public void receive(byte[] audio, IUser iUser, char sequence, int timestamp) {
        System.out.println("Receive called!");
        WaveFileWriter writer = new WaveFileWriter();
        ByteArrayInputStream stream = new ByteArrayInputStream(audio);
        try {
            AudioFormat format = AudioSystem.getAudioFileFormat(stream).getFormat();
            writer.write(new AudioInputStream(stream, format, audio.length), AudioFileFormat.Type.WAVE, new File("D:\\BotRecordings\\" + new Date().getTime() + ".wav"));
            System.out.println("Saving stream!");
        } catch (IOException | UnsupportedAudioFileException e) {
            e.printStackTrace();
        }
    }
}