import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class JPanelDrawLinesShapesText extends JFrame
{
	JFrame frame = new JFrame();

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

	public JPanelDrawLinesShapesText()
	{
		// Set up the JFrame
		frame.setSize(500, 400);
		frame.setLocationRelativeTo(null);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setTitle("Demo:  Drawing On JPanel");

		// Create a JPanel and a method for "painting" it
		JPanel panel = new JPanel()
		{
			@Override
			public void paint(Graphics g)
			{
				// Call the "paint" method in the parent class
				super.paint(g);

				// Call a method (below) to do the drawing
				DrawStuff(g);
			}
		};

		// Set the background color of the JPanel
		panel.setBackground(Color.WHITE);

		// Add the JPanel to the JFrame
		frame.add(panel);

		frame.setVisible(true);
	}

	public void DrawStuff(Graphics g)
	{
		// Draw a blue line
		g.setColor(Color.BLUE);
		g.drawLine(45, 25, 445, 25);
	
		// Draw a red rectangle
		g.setColor(Color.RED);
		g.drawRect(45, 50, 400, 285);

		// Draw some green text
		g.setColor(Color.GREEN);
		g.setFont(new Font("Arial", Font.BOLD, 30));
		g.drawString("Hello, World!", 155, 120);

		// Draw a filled-in magenta circle
		g.setColor(Color.MAGENTA);
		g.fillOval(200, 180, 100, 100);
	}
}