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

public class Farby extends JFrame implements AdjustmentListener
{
    private JScrollBar sb1, sb2, sb3;
    private JLabel l1;
    private JButton b1;
    private Color c;

    public void adjustmentValueChanged(AdjustmentEvent e){
        c = new Color(sb1.getValue(), sb2.getValue(), sb3.getValue());
        b1.setBackground(c);
        l1.setText("Barva ["+sb1.getValue()+","+sb2.getValue()+","+sb3.getValue()+"]");
    }

    public Farby(){
        super("Barvičky!");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);

        setLayout(new BorderLayout());
        sb1 = new JScrollBar(JScrollBar.HORIZONTAL,0,1,0,256);
        sb1.addAdjustmentListener(this);
        add(sb1, BorderLayout.NORTH);

        sb2 = new JScrollBar(JScrollBar.VERTICAL,0,1,0,256);
        sb2.addAdjustmentListener(this);
        add(sb2, BorderLayout.WEST);

        sb3 = new JScrollBar(JScrollBar.HORIZONTAL,0,1,0,256);
        sb3.addAdjustmentListener(this);
        add(sb3, BorderLayout.SOUTH);

        l1 = new JLabel("Barva ["+sb1.getValue()+","+sb2.getValue()+","+sb3.getValue()+"]");
        l1.setHorizontalAlignment(JLabel.CENTER);
        add(l1, BorderLayout.CENTER);
        b1 = new JButton("                                ");
        add(b1, BorderLayout.EAST);


        pack();
    }
}