org.jruby.exceptions
Exceptions 
JumpException
JumpException.BreakJump
JumpException.FlowControlException
JumpException.NextJump
JumpException.RedoJump
JumpException.RetryJump
JumpException.ReturnJump
JumpException.SpecialJump
JumpException.ThrowJump
MainExitException
RaiseException
ThreadKill