Practice›Java Fundamentals›Module 9. Generics›9.1 Generic classes

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9.1 Generic classes — write a generic Pair

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Task

Write the generic class Pair<K, V> holding a key of type K and a value of type V, both set by the constructor.

Two independent type parameters: the program prints age and then 30.

Your solution

class Pair<K, V> {
    // two fields of types K and V, a constructor, then getKey and getValue

}

public class Main {
    public static void main(String[] args) {
        Pair<String, Integer> p = new Pair<String, Integer>("age", 30);
        System.out.println(p.getKey());
        System.out.println(p.getValue());
    }
}

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