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Home/ Questions/Q 5961429
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Editorial Team
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Editorial Team
Asked: May 22, 20262026-05-22T18:57:49+00:00 2026-05-22T18:57:49+00:00

public Object[] convertTo(Map source, Object[] destination) { … } Is there a possibility to

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public Object[] convertTo(Map source, Object[] destination) {
    ...
}

Is there a possibility to figure out the generic types (key / value) of my Map parameter via Reflection?

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  1. Editorial Team
    Editorial Team
    2026-05-22T18:57:50+00:00Added an answer on May 22, 2026 at 6:57 pm

    Given a Map<Key,Value>, it isn’t possible to figure out Key and Value at runtime. This is due to type erasure (also, see Wikipedia).

    It is, however, possible to examine each object (key or value) contained in the map, and call their getClass() method. This will tell you the runtime type of that object. Note that this still won’t tell you anything about the compile-type types Key and Value.

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