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並前往https://www.freecodecamp.org/news/understanding-java-generic-types-covariance-and-contravariance-88f4c19763d2/

An introduction to generic types in Java: covariance and ...

Contravariance: accept supertypes. Arrays. In Java, arrays are covariant, which has 2 implications. Firstly, an array of type T[] may contain ...

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