Dickerson chose the Gators over offers from LSU, Washington, Georgia Tech and others. He was originally committed to Georgetown but sought a different school when the Hoyas took a commitment from big man Jessie Govan.
A native of Montverde, Fla., Dickerson is rated the No. 56 player in the country by Rivals.com.
"I fit in pretty well because they won't have anyone in that position," Dickerson said. "They like me inside, but they like me playing on the outside too. They want to develop me into a stretch four."
Florida also has 2015 commitments from four-star shooting guard KeVaughn Allen and three-star forward Kevarrius Hayes.
The Gators went 36-3 in 2013-14, falling in the Final Four to eventual national champion Connecticut.
- Ben Estes