private void checkDisplayCollision() {
		int futureX = this.getLocation().x - moveRichtungX;
		int futureY = this.getLocation().y - moveRichtungY;

		if (futureX > 0)
			futureX += moveRichtungX;
		if (futureY > 0)
			futureY += moveRichtungY;
		if (this.getLocation().x + getLevelWidth() - moveRichtungX < Start
				.getFrameWidth())
			futureX += moveRichtungX;
		if (this.getLocation().y + getLevelHeight() - moveRichtungY < Start
				.getFrameHeight())
			futureY += moveRichtungY;

		this.setBounds(futureX, futureY, this.getWidth(), this.getHeight());
	}