Java.reflect questions

hi guys.. im a java newb and I have some questions about reflection. Here is my code in my driver

Java Code:

public class Driver {

        @SuppressWarnings("unused")
        public static void main(String[] args) throws InstantiationException, IllegalAccessException 
        {
                String a = "ExamplesPkg.Bicycle";
                try {
                        Class<?> newClass = Class.forName(a);
                        Constructor<?> [] mountainBicycleConstructors = newClass.getConstructors();
                        for(Constructor<?> constructors: mountainBicycleConstructors)
                                System.out.println(constructors);
                
                        Cadance meansOfTransport = (Cadance)newClass.newInstance();

                } catch (ClassNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }

Bicycle class

Java Code:

package ExamplesPkg;

public class Bicycle implements Cadance {
    
    // the Bicycle class has
    // three fields
    public int cadence;
    public int gear;
    public int speed;
        
    // the Bicycle class has
    // one constructor
    public Bicycle(int startCadence, int startSpeed, int startGear) 
    {
        gear = startGear;
        cadence = startCadence;
        speed = startSpeed;
    }
        
    // the Bicycle class has
    // four methods
    public void setCadence(int newValue) 
    {
        cadence = newValue;
    }
}

Cadance interface

Java Code:

package ExamplesPkg;

public interface Cadance {

        public void setCadence(int newValue);
}

so I created some dummy interface just so I could simulate a situation where you dont know the name of a class that you want to instantiate an object of but you do know that it implents a certain interface. So my driver works well until it gets to the

Java Code:

Cadance meansOfTransport = (Cadance)newClass.newInstance();

line. Clearly my System.out.println(constructors); print public ExamplesPkg.Bicycle(int,int,int). So I got the class that I wanted. Now i just want to create an instance of it and im trying to do that ... but when the object "meansOfTransport" gets created I cannot access the default constructor.

So how can I create an instance of Bicycle like this?