import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.Color;
import java.awt.Graphics;

public class GraphicalObjectsWithPainting extends JFrame
{
	private static JButton button1;

	public static void main(String[] args)
	{
		new GraphicalObjectsWithPainting();
	}

	// Constructor
	public GraphicalObjectsWithPainting()
	{

		// Set up the JFrame; note that it is NOT necessary to explicitly
		//  create a 'JFrame' object here, since extending the 'JFrame'
		//  class does that automatically
		setLayout(null);
		setResizable(false);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(400, 200);
		setTitle("Combining Graphical Objects & Painting on a JFrame");
		getContentPane().setBackground(Color.LIGHT_GRAY);
		setLocationRelativeTo(null);

		// Create and set up a button; note that other graphical objects
		//  can always be created here as well
		button1 = new JButton();
		button1.setBounds(40, 90, 315, 41);
		button1.setText("I am a JButton.  Above is an oval.  Below is a line.");
		button1.setFocusable(false);
		button1.setVisible(true);

		// Add the JButton to the JFrame, and then make the JFrame (and
		//  everything on it) visible
		add(button1);
		setVisible(true);
	}

	public void paint(Graphics g)
	{
		// This line is necessary to clear/refresh the background
		super.paintComponents(g);

		// Desired shapes/lines can be drawn here
		g.setColor(Color.RED);
		g.fillOval(175, 36, 50, 50);
		g.setColor(Color.BLUE);
		g.drawLine(20, 180, 380, 180);
	}
}