public void keyReleased(KeyEvent e) {
	        int key = e.getKeyCode();
	
	        if (key == KeyEvent.VK_LEFT) {
	            dx = 0;
	        }
	
	        if (key == KeyEvent.VK_RIGHT) {
	            dx = 0;
	        }
	
	        if (key == KeyEvent.VK_UP) {
	            dy = 0;
	        }
	
	        if (key == KeyEvent.VK_DOWN) {
	            dy = 0;
	        }
	    }