Meh.java

class Meh {
    interface I1 {
        Foo<Number> m(String s);
    }

    interface I2 {
        Foo<Number> m(Integer i);
    }

    static class Foo<T extends Number> {
        Foo(T t) {
            System.out.println(t);
        }
    }

    private static void m(I1 i) {
        i.m("Foo");
    }

    private static void m(I2 i) {
        i.m(42);
    }

    public static void main(String[] args) {
        m(Foo::new);
    }
}