Ja Rule doesn't just have his summer planned out ... he's got the next few years on lock -- because once June rolls around, he'll be serving a very long prison sentence ... for having a loaded gun in his car.
As previously reported, Ja pled guilty to attempted criminal possession of a weapon back in December -- and agreed to serve two years for the offense.
Livin' it up. What do I do
I'm going to jail gettin' locked