If he pleads not guilty, the trial proceeds.
Trial .-- After the joining of issue, and before the court proceeds to the examination of the merits of the case, a jury is impaneled as in a civil action.

A jury may be waived by the defendant.

Then follow the taking of the testimony, the arguments of counsel, the consideration and verdict by the jury.

The defendant is then discharged if not guilty, or sentenced if found guilty.

The penalty depends, of course, upon the nature of the offense.
PROCEEDINGS IN EXAMINATION.
Need of Examination .-- Over crimes punishable by fine greater than $100 or imprisonment for more than three months, a justice of the peace usually has no jurisdiction of trial.