A system, method and computer program product to provide a technique for achieving high speed and stable dispatch of a code in a programming language based on erasure, the code being converted from a code written in a programming language based on reification. The system, method and computer program product perform a function of adding a synthetic class having the same name as a suffix for name mangling of a normal method in a first programming language based on reification, adding a dummy parameter of the type of the synthetic class to a constructor definition, and adding an appropriate value (normally, null) that matches the type of the dummy parameter to a constructor invocation to convert the code in the first programming language to a code in a second programming language based on erasure.