Exercise1.java

/**
 * @author viktorvoltz
 */

interface HasBatteries {
}

interface Waterproof {
}

interface Shoots {
}

class Toy {
    // Comment out the following default constructor
    // to see NoSuchMethodError from (*1*)
    //Toy() {
    //}

    Toy(int i) {
    }
}

class FancyToy extends Toy
        implements HasBatteries, Waterproof, Shoots {
    FancyToy() {
        super(1);
    }
}

class ToyTest {
    static void printInfo(Class<?> cc) {
        System.out.println("Class name: " + cc.getName() +
                " is interface? [" + cc.isInterface() + "]");
                System.out.println("Simple name: " + cc.getSimpleName());
                System.out.println("Canonical name : " + cc.getCanonicalName());
    }

    public static void main(String[] args) {
        Class<?> c = null;
        try {
            c = Class.forName("FancyToy");
        } catch (ClassNotFoundException e) {
            System.out.println("Can’t find FancyToy");
            System.exit(1);
        }
        printInfo(c);
        for (Class<?> face : c.getInterfaces())
            printInfo(face);
        Class<?> up = c.getSuperclass();
        Object obj = null;
        try {
            // Requires default constructor:
            //cannot instantiate
            obj = up.newInstance();
            //System.out.println("obj " + obj + " " +obj.getClass().getName());
        } catch (InstantiationException e) {
            System.out.println("Cannot instantiate");
            System.exit(1);
        } catch (IllegalAccessException e) {
            System.out.println("Cannot access");
            System.exit(1);
        } catch (NoSuchMethodError e){
            System.out.println("NoSuchMethodError");
            System.exit(1);
        }
        printInfo(obj.getClass());
    }
}