public void setDirection(Direction direction) { if(this.direction==Direction.LEFT&&direction!=Direction.RIGHT) this.direction = direction; else if(this.direction==Direction.UP&&direction!=Direction.DOWN) this.direction = direction; else if(this.direction==Direction.RIGHT&&direction!=Direction.LEFT) this.direction = direction; else if (this.direction==Direction.DOWN&&direction!=Direction.UP) this.direction = direction; }