Language-Shifting Objects From Java to Smalltalk

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Foreign-function interfaces enable programs in a host language to interoperate with programs written in another language and vice-versa. Two languages that feature such an interface to a common language can even interoperate by means of this common intermediate language. Smalltalk and Java, for example, both offer an interface to C and can therefore interoperate through a connection of these interfaces. However, the resulting interactions will need to occur at the level of abstraction offered by the (Low-Level) C interfaces, although both Java and Smalltalk are object-oriented languages.