reflection newinstance constructor java wrong number of arguments

I am learning Reflection in Java, and trying to make an example of Constructor. But there is a problem: "wrong number of arguments". Searching through google and stackoverflow, I cannot find the same problem as I am currently facing. can anyone please help me to understand the problem, thank you so much. This is my codes:

    public static void main(String[] args) {
    PrintClass f = new PrintClass();
    Class cl = f.getClass();
    Constructor<?> constructor[] = cl.getDeclaredConstructors(); // cl.getDeclaredConstructors() also won't work...

    f.field1 = 3;
    PrintClass p1 = null;
    PrintClass p2 = null;

    try {
        p1 = (PrintClass) constructor[0].newInstance(); // constructor[0].newInstance((Object[])args) also won't work...
        p2 = (PrintClass) constructor[1].newInstance("this is not PrintClass-------");

        p1.print();
        p2.print();

    } catch (InstantiationException | IllegalAccessException
            | IllegalArgumentException | InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    }
}

class PrintClass {
String s = "this is PrintClass...";
int field1;

public PrintClass(String s) {
    this.s = s;
}

public PrintClass() {
}

public void print() {
    System.out.println(s);
}

}

and this is the error

java.lang.IllegalArgumentException: wrong number of arguments
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at reflection.MainClass.main(MainClass.java:18)

Again, thank you so much for helping me understand the problem. :)