Java 8 Supplier with arguments in the constructor

Question

Why do suppliers only support no-arg constructors?

If the default constructor is present, I can do this:

create(Foo::new)

But if th

Answer 1

If you have a constructor for new Klass(ConstructorObject) then you can use Function like this:

interface Interface {
    static Klass createKlass(Function, Klass> func, Map input) {
        return func.apply(input);
    }
}
class Klass {
    private Integer integer;
    Klass(Map map) {
        this.integer = map.get("integer");
    }
    public static void main(String[] args) {
        Map input = new HashMap<>();
        input.put("integer", 1);
        Klass klazz = Interface.createKlass(Klass::new, input);
        System.out.println(klazz.integer);
    }
}