В чем ошибка Java кода?
Серёга Третьяков

import javax.imageio.ImageIO;
import javax.swing.;
import java.awt.;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;

class GameWindow extends JFrame{

private static GameWindow game_window;
private static long last_frame_time;
private static Image fon;
private static Image game_over;
private static Image drop;
private static float drop_left = 200;
private static float drop_top = -100;
private static float drop_v = 200;
private static int score;

public static void main(String[] args) throws IOException{
fon = ImageIO.read(GameWindow.class.getResourceAsStream("fon.png"));
game_over = ImageIO.read(GameWindow.class.getResourceAsStream("game_over.png"));
drop = ImageIO.read(GameWindow.class.getResourceAsStream("drop.png"));
game_window = new GameWindow();
game_window.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
game_window.setLocation(200, 100);
game_window.setSize(906, 478);
game_window.setResizable(false);
last_frame_time = System.nanoTime();
GameField game_field = new GameField();
game_field.addMouseListener(new MouseAdapter(){
@Override
public void mousePressed(MouseEvent e){
int x = e.getX();
int y = e.getY();
float drop_right = drop_left + drop.getWidht(null);
float drop_bottom = drop_top + drop.getHeight(null);
boolean is_drop = x >= drop_left && x <= drop_right && y >= drop_top && y <= drop_bottom;
if(is_drop){
drop_top = -100;
drop_left = (int) (Math.random() * (game_field.getWidht() - drop.getWidht(null)));
drop_v = drop_v + 20;
score++;
game_window.setTitle("Score: " + score);
}
}
});
game_window.add(game_field);
game_window.setVisible(true);
}

private static void onRepaint(Graphics g){
long current_time = System.nanoTime();
float delta_time = (current_time - last_frame_time) * 0.000000001f;
last_frame_time = current_time;

drop_top = drop_top + drop_v * delta_time;
g.drawImage(fon, 0, 0, null);
g.drawImage(drop, (int) drop_left, (int) drop_top, null);
if(drop_top > game_window.getHeight())g.drawImage(game_over, 280, 120, null);

}

private static class GameField extends JPanel{

@Override
protected void paintComponent(Graphics g){
    super.paintComponent(g);
    onRepaint(g);
    repaint();
}

}

}
В чём ошибка?!Пишет 4 ошибки,3 из них в строке drop_left = (int) (Math.random() * (game_field.getWidht() - drop.getWidht(null)));

1 чел.