import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Okno implements ActionListener
{
    JButton start;
    JTextField x,c;
    JTextField wynik;
    public Okno()
    {
        JFrame frame = new JFrame("Swing Paint");
        Container content = frame.getContentPane();
        // set layout on content pane
        content.setLayout(new BorderLayout());
        // create draw area

        // create controls to apply colors and call clear feature
        JPanel controls = new JPanel();
        JPanel controls2 = new JPanel();

        x = new JTextField(5);
        c = new JTextField(30);
        wynik = new JTextField(20);
        start = new JButton("Start");
        start.addActionListener(this);
        wynik.setEditable(false);

        controls.add(x);
        controls.add(start);
        controls.add(wynik);

        controls2.add(new JLabel("C ="));
        controls2.add(c);

        // add to content pane
        content.add(controls, BorderLayout.CENTER);
        content.add(controls2, BorderLayout.NORTH);

        frame.setSize(400, 150);
        // can close frame
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // show the swing paint result
        frame.setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == start)
        {
            String s = c.getText();
            String[] splited = s.split("\\s+");
            double tab[] = new double[splited.length];
            for(int i = 0; i < splited.length; i++)
            {
                tab[i] = Double.parseDouble(splited[i]);
            }
            wynik.setText(String.valueOf(licz(Double.parseDouble(x.getText()),tab)));
        }
    }

    public double licz(double x, double tab[])
    {
        double output  = 0.0;
        int tmp = 0;

        for(int i=tab.length-1;i>0;i--){
            output += tab[tmp] * Math.pow(x,i);
            tmp++;
        }
        output += tab[tab.length-1];
        return output;
    }

    public static void main()
    {
        Okno o = new Okno();
    }
}