Your right to trial by jury only exists in certain criminal cases.
If you have been charged with a "non-minor" offence, you will be tried by a judge sitting with a jury. There are some offences for which you will be given a choice - whether you want to have your case decided by a District Court Judge sitting alone or by a judge sitting with a jury.
The jury must consist of non-lawyers who have been chosen at random from a diverse range of jurors from the community.