Java Reflection: Create an implementing class

Question

Class someInterface = Class.fromName(\"some.package.SomeInterface\");

How do I now create a new class that implements someInterface?

Answer 1

Actually, you have to use the class name in Class.fromName() method and cast to your interface type. See if the sample below helps.

public class Main {

    public static void main(String[] args) throws Exception {
        Car ferrari = (Car) Class.forName("Mercedez").newInstance();
        System.out.println(ferrari.getName());
    }
}

interface Car {
    String getName();
}

class Mercedez implements Car {

    @Override
    public String getName() {
        return "Mercedez";
    }

}

class Ferrari implements Car {

    @Override
    public String getName() {
        return "Ferrari";
    }

}