Why it is giving me no such method exception?

Question

import java.lang.reflect.Constructor;

class tr1 {

    public static void main(String[] args) {
        try {
            if (args.length < 1)
                throw(new Exception("baby its wrong"));
            Class s = Class.forName(args[0]);
            Constructor c = s.getDeclaredConstructor(int.class, char.class, String.class, String.class);
            Object o = c.newInstance(Integer.parseInt(args[1]), args[2].charAt(0), args[3], args[4]);
            System.out.println("description of object " + o);

        } catch (Exception e) {
            System.out.println(e);  
        }
    }   
}

class A {

    public A(int a, char c, String... strings){
        System.out.println(a);
        System.out.println(c);
        for (String q:strings) {
            System.out.println(q);
        }
    }   

}

Why this code is giving me NoSuchMethod exception? Any solution for it?

Answer 1

Because an ellipsis is syntactic sugar for an array.

You should:

s.getDeclaredConstructor(int.class, char.class, String[].class);

(and as @JonSkeet mentions in his answer, you should also make your third argument an array in the .newInstance() invocation)