[hardwired]

Code:

//  <applet code="HouseDrawing" width="400" height="400"></applet>
import java.awt.*;
import java.awt.geom.Line2D;
import javax.swing.*;

public class HouseDrawing extends JApplet {
    public void init() {
        add(new HouseDrawPanel());
    }
}

class HouseDrawPanel extends JPanel {
    int rows = 32;
    int cols = 32;
    int pad = 20;

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        double xInc = (double)(w - 2*pad)/cols;
        double yInc = (double)(h - 2*pad)/rows;
        g2.setPaint(new Color(210,200,230));
        for(int j = 0; j <= rows; j++) {
            double y = pad + j*yInc;
            g2.draw(new Line2D.Double(pad, y, w-pad, y));
        }
        for(int j = 0; j <= cols; j++) {
            double x = pad + j*xInc;
            g2.draw(new Line2D.Double(x, pad, x, h-pad));
        }
        g2.setPaint(Color.red);
        double x1 = pad + 5*xInc;
        double y1 = pad + (rows/2)*yInc;
        double x2 = x1;
        double y2 = pad + (rows-5)*yInc;
        g2.draw(new Line2D.Double(x1, y1, x2, y2));
        x2 = pad + (cols/2)*xInc;
        g2.draw(new Line2D.Double(x1, y2, x2, y2));
        x1 = x2;
        double length = y2 - y1;
        y1 = y1 + length/2;
        g2.draw(new Line2D.Double(x1, y1, x2, y2));
    }
}