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

class SajatPanel extends JPanel {
	SajatPanel() {
		setBackground(Color.blue);
		setBounds(100, 100, 300, 300);
	}

	public void paint(Graphics g) {
		g.setColor(getBackground());
		g.fillRect(0, 0, getWidth(), getHeight());
		g.setColor(getForeground());

		Color szin = new Color(0,0,255);
		g.setColor(szin);
		g.drawString("valami", 50, 10);
	}
}

class Program extends JFrame {
	SajatPanel panel;
	Program() {
		panel = new SajatPanel();

		panel.setBackground(Color.blue);


		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setLayout(null);
		add(panel);

		setSize(800, 600);
		setVisible(true);
	}
	public static void main(String[] argv) {
		new Program();
	}
}