Class对象使用实例，反射的基本原理

/***Class对象使用实例，来源《Think in Java》*/package typeinfo.toys;interface HasBatteries{}interface Waterproof{}interface Shoots{}class Toy{Toy(){}Toy(int i){}}class FancyToy extends Toy implements HasBatteries,Waterproof,Shoots{FancyToy(){super(1);}}public 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("typeinfo.toys.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{obj = up.newInstance();System.out.println(obj);System.out.println(c.newInstance());}catch(InstantiationException e){System.out.println("Canot instantiate");}catch(IllegalAccessException e){System.out.println("Canot access");System.exit(1);}printInfo(obj.getClass());}}