Bot Code Fragment

import java.util.LinkedList;

public class MessageSender implements Runnable {

    private int messageLimit = 100;
    private int messageTime = 31;

    private LinkedList<String> messageList;
    private LinkedList<Integer> timeList;
    private MyBot bot;
    private String channel;

    public MessageSender(MyBot bot, String channel) {
        this.bot = bot;
        this.channel = channel;
        messageList = new LinkedList<String>();
        timeList = new LinkedList<Integer>();
    }

    @Override
    public void run() {
        while (true) {
            if (messageList.isEmpty() == false) {
                while (timeList.isEmpty() == false && timeList.getFirst() < ((int) (System.currentTimeMillis() / 1000) - messageTime)) {
                    timeList.removeFirst();
                }

                while ((timeList.size() < messageLimit)
                        && (messageList.isEmpty() == false)) {
                    bot.sendMessage(channel, messageList.removeFirst());
                    timeList.addLast((int) (System.currentTimeMillis() / 1000));
                }

                try {
                    Thread.sleep(35);
                } catch (InterruptedException ex) {
                    System.err.println("Thread can/'t sleep.");
                }
            } else {
                try {
                    Thread.sleep(250);
                } catch (InterruptedException ex) {
                    System.err.println("Thread can/'t sleep.");
                }
            }
        }
    }

    public void sendMessage(String message) {
        if (timeList.size() < messageLimit) {
            bot.sendMessage(channel, message);
            timeList.addLast((int) (System.currentTimeMillis() / 1000));
        } else {
            if (messageList.contains(message) == false) {
                messageList.addLast(message);
                System.out.println("Current message queue: "
                        + messageList.size());
            } else{
                System.out.println("Not sending repeated message.");
            }
        }
    }

}