Change your code to :
int height = super.getHeight();
super.setHeight(++height);
note that you don't need to call super.method(). as long as the method is protected (public even better) you can just simplify it to :
int height = getHeight();
setHeight(++height);
You only call super. if you implement the method again in your child class and want to specifically call the parent class, which usually can be seen in constructor calling parent constructor.
One more thing : your accessor need to be changed a bit just for pre-caution case. see code below. Usually your IDE should support auto generation of accessor.
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}