1. A method for running distributed programs in a hybrid system having heterogeneous platforms, comprising: trapping a program's method call in runtime of a program executing on a processor; looking up a symbolic reference associated with the trapped method call for one or more platform-specific implementations; selecting a platform-specific implementation from said one or more platform-specific implementations based on affinity measure associated with said one or more platform-specific implementations, the affinity measure indicating how efficiently said one or more platform-specific implementations run on respective one or more platforms in said hybrid system; returning a direct reference to the selected platform-specific implementation; and replacing the symbolic reference associated with the trapped method call with the returned direct reference to the selected platform-specific implementation, wherein the hybrid system comprises at least a general-purpose processor and a special-purpose processor, and said one or more platform-specific implementations comprise at least code programmed to execute on the special-purpose processor.