import java.awt.Graphics;
import javax.swing.JApplet;
import javax.swing.JOptionPane;

@SuppressWarnings("serial")
public class Rectangle extends JApplet
{
	private int x, y, w, h;

	public void init()
	{

		try
		{
			String xinput = JOptionPane.showInputDialog("Enter x-coordinate of the top left corner: ");
			x = Integer.parseInt(xinput);
		}
		catch (Exception e)
		{
			System.out.println("ERROR: You entered a non-integer value.");
			System.exit(0);
		}
		if (x < 0)
		{
			System.out.println("ERROR: You entered a negative number.");
			System.exit(0);
		}

		try
		{
			String yinput = JOptionPane.showInputDialog("Enter y-coordinate of the top left corner: ");
			y = Integer.parseInt(yinput);
		}
		catch (Exception e)
		{
			System.out.println("ERROR: You entered a non-integer value.");
			System.exit(0);
		}
		if (y < 0)
		{
			System.out.println("ERROR: You entered a negative number.");
			System.exit(0);
		}

		try
		{
			String winput = JOptionPane.showInputDialog("Enter the desired width of the rectangle: ");
			w = Integer.parseInt(winput);
		}
		catch (Exception e)
		{
			System.out.println("ERROR: You entered a non-integer value.");
			System.exit(0);
		}
		if (w < 0)
		{
			System.out.println("ERROR: You entered a negative number.");
			System.exit(0);
		}

		try
		{
			String hinput = JOptionPane.showInputDialog("Enter the desired height of the rectangle: ");
			h = Integer.parseInt(hinput);
		}
		catch (Exception e)
		{
			System.out.println("ERROR: You entered a non-integer value.");
			System.exit(0);
		}
		if (h < 0)
		{
			System.out.println("ERROR: You entered a negative number.");
			System.exit(0);
		}
	}

	public void paint(Graphics g)
	{
		super.paint(g);

		g.drawRect(x, y, w, h);
	}
}