DuPage County Circuit Court Judge Blanche Fawell handed down the sentence Monday against 40-year-old Agim Demiri, who pleaded guilty in August to damaging state property.
The egg narrowly missed Judge Timothy McJoynt when it was thrown in March. Prosecutors say the mess caused $616.78 in damage.
The Daily Herald in Arlington Heights reports that Demiri also was ordered to pay restitution for the cleanup.
Prosecutors say the Naperville man had appeared before McJoynt numerous times before as part of an ongoing child support issue.
