Program but need help working

Question

I have this program done but when I try to run it wouldnt work
What I have to create to make it work
Thanks
import java.awt.Graphics;
import java.awt.Color;
public class Building
private final int DEFAULT_WIDTH = 50;
private final int DEFAULT_HEIGHT = 100;
private final int DEFAULT_WINDOWS = 5;
private final int WINDOW_SIZE = 5;
private int width, height, windows;
// Sets up this Building based on default values.
public Building ()
width = DEFAULT_WIDTH;
height = DEFAULT_HEIGHT;
// Constructor: Sets this Building's size.
public Building (int buildingWidth, int buildingHeight)
width = buildingWidth;
height = buildingHeight;
// Returns the width of this building.
public int getWidth ()
return width;
// Draws the building.
public void draw (Graphics page, int leftedge, int bottom)
int winX, winY;
int top = bottom - height;
page.setColor (Color.black);
page.fillRect (leftedge, top, width, height);
// Draw three windows in random locations
page.setColor (Color.yellow);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
}

Answer 1

HI, This might work.
publi class Building{
public static void main(String args[]){new Building1();}
class Building1
private final int DEFAULT_WIDTH = 50;
private final int DEFAULT_HEIGHT = 100;
private final int DEFAULT_WINDOWS = 5;
private final int WINDOW_SIZE = 5;
private int width, height, windows;
// Sets up this Building based on default values.
public Building ()
width = DEFAULT_WIDTH;
height = DEFAULT_HEIGHT;
// Constructor: Sets this Building's size.
public Building (int buildingWidth, int buildingHeight)
width = buildingWidth;
height = buildingHeight;
// Returns the width of this building.
public int getWidth ()
return width;
// Draws the building.
public void draw (Graphics page, int leftedge, int bottom)
int winX, winY;
int top = bottom - height;
page.setColor (Color.black);
page.fillRect (leftedge, top, width, height);
// Draw three windows in random locations
page.setColor (Color.yellow);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
winX = leftedge + (int) (Math.random() * (width-WINDOW_SIZE));
winY = top + (int) (Math.random() * (height-WINDOW_SIZE));
page.fillRect (winX, winY, WINDOW_SIZE, WINDOW_SIZE);
}