import java.awt.*;
import javax.swing.*;
import java.math.*;
import java.io.*;
import java.util.*;
import java.awt.event.*;

public class wejsciowka
{
  public static void main(String[]arg)
  {
	Okno o1=new Okno("Okienko",0,0,500,500,Color.YELLOW);
  }

}
///////////////////////////////////////////////////////////////////////////////////////////////////////////
class Okno extends JFrame
{
	private Container tlo;

	public Okno(String tytul, int x0, int y0, int szer, int wys,Color k)
	{
		super(tytul);
		setBounds(x0,y0,szer,wys);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		tlo=getContentPane();
		tlo.setBackground(k);
		budujUI();
		setVisible(true);
	}

	private void budujUI()
	{
		tlo.setLayout(new BorderLayout());
		JPanel gorny=new JPanel();
		gorny.setBackground(Color.BLUE);
		gorny.setLayout(new FlowLayout());

		JButton b1=new JButton("czerwony");
		b1.addActionListener(new Kolory(Color.RED)); //nasłuchiwacz zdarzenia.

		gorny.add(b1);


		JButton b2=new JButton("zielony");
		b2.addActionListener(new Kolory(Color.GREEN));
		gorny.add(b2);


		JButton b3=new JButton("niebieski");
		b3.addActionListener(new Kolory(Color.BLUE));

		gorny.add(b3);

		JButton b4=new JButton("Zamykamy");
		//b4.addActionListener(new Zamykamy());
		b4.addActionListener(new ActionListener()
		{
			@Override
			public void actionPerformed(ActionEvent e)
			{
				dispose();
			}
		});
		gorny.add(b4);

		tlo.add(BorderLayout.NORTH,gorny);

	}
	/////////////////////////////////////////////////////////////////////////////////////////////////
	class Kolory implements ActionListener
	{

		private Color k;
		public Kolory (Color ak)
		{
			k = ak;
		}
		@Override
		public void actionPerformed(ActionEvent e)
		{
			tlo.setBackground(k);
		}
	}
	////////////////////////////////////////////////////////////////////////////////////////////////

}
////////////////////////////////////////////////////////////////////////////////////////////////////







/*
class Zielony implements ActionListener
	{
		@Override
		public void actionPerformed(ActionEvent e)
		{
			tlo.setBackground(Color.GREEN);
		}
	}
	class Niebieski implements ActionListener
	{
		@Override
		public void actionPerformed(ActionEvent e)
		{
			tlo.setBackground(Color.BLUE);
		}
	}
	class Zamykamy implements ActionListener
	{
		@Override
		public void actionPerformed(ActionEvent e)
		{
			dispose();
		}
	}
*/