Practice›Java Fundamentals›Module 9. Generics›9.3 Wildcards

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9.3 Wildcards — count numbers above a threshold

Total: 0 / 3 pts

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Task

Fill in countAbove so that it returns how many numbers are strictly greater than threshold.

Reading is allowed through ? extends Number; adding would not compile. The program prints 2.

Your solution

import java.util.ArrayList;
import java.util.List;

public class Main {

    public static int countAbove(List<? extends Number> nums, double threshold) {
        // count elements strictly above the threshold

    }

    public static void main(String[] args) {
        List<Integer> ints = new ArrayList<Integer>();
        ints.add(1);
        ints.add(5);
        ints.add(9);
        System.out.println(countAbove(ints, 4.0));
    }
}

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