  We show that injecting nonequilibrium spins into the superconducting leads
strongly enhances the stationary Josephson current through a
superconductor-ferromagnet-superconductor junction. The resulting long-range
super-current through a ferromagnet is carried by triplet Cooper pairs that are
formed in s-wave superconductors by the combined effects of spin injection and
exchange interaction. We quantify the exchange interaction in terms of Landau
Fermi-liquid factors. The magnitude and direction of the long-range Josephson
current can be manipulated by varying the angles of the injected polarizations
with respect to the magnetization in the ferromagnet.
