FastReader

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JSlider;
import javax.swing.JTextArea;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class FastReader extends JFrame implements ActionListener, ChangeListener {
    class DoReadTask extends TimerTask {
        String[] textSplit = inputArea.getText().split("\\ ");
        int i = 0;

        public void run() {
            if(textSplit.length>0){
                text.setText(textSplit[i]);
                ++i;
                if(i==textSplit.length){
                    timer.cancel();
                    read = false;
                }
            } else {
                timer.cancel();
                read = false;
            }
        }
    }

    private JTextArea inputArea = new JTextArea("Írja be a szöveget");
    private JScrollPane scrollArea = new JScrollPane(inputArea);
    private JButton doReadButton = new JButton("Mehet!");
    private JButton stopReadButton = new JButton("Állj!");
    private JSlider slider = new JSlider();
    private JLabel sliderLabel = new JLabel("Gyorsaság: " + Integer.toString(slider.getValue()), JLabel.CENTER);
    private JLabel text = new JLabel("Ide fogom kiírni!", JLabel.CENTER);
    private boolean read = false;
    private Timer timer;

    public FastReader(){
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        getContentPane().setLayout(new GridLayout(0, 1));
        setBounds(60, 50, 900, 500);
        setResizable(false);
        setVisible(true);

        doReadButton.setActionCommand("startRead");
        doReadButton.addActionListener(this);
        stopReadButton.setActionCommand("stopRead");
        stopReadButton.addActionListener(this);

        slider.addChangeListener(this);

        getContentPane().add(text);
        getContentPane().add(doReadButton);
        getContentPane().add(stopReadButton);
        getContentPane().add(sliderLabel);
        getContentPane().add(slider);
        getContentPane().add(scrollArea);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().equals("startRead")){
            if(false==read){
                read = true;
                int sliderValue = 301 - slider.getValue() * 2;
                timer = new Timer();
                timer.schedule(new DoReadTask(), 700, sliderValue);
            }
        }
        if(e.getActionCommand().equals("stopRead")){
            read = false;
            timer.cancel();
        }
    }

    @Override
    public void stateChanged(ChangeEvent che) {
        try {
            sliderLabel.setText("Gyorsaság: " + Integer.toString(slider.getValue()));
        } catch (Exception e){
            e.printStackTrace();
        }
    }

    public static void main(String args[]){
        FastReader fastReader = new FastReader();
    }
}