/*     * Constructor. Only the Java Virtual Machine creates Class     * objects.     */    private Class() {}Class类的构造函数是私有的，只有jvm能new Class 不能 new Class
    
     ();
    

/** * Run Time Type Information */public class Client {	public static void main(String[] args) {		Object obj = new Client();		/**class com.RTTI.test.Client*/		System.out.println(obj.getClass());		System.out.println(obj.getClass().getName());		System.out.println(int.class);				Class
    
      genri = int.class;		genri = Integer.class;		/**		 * error:Type mismatch: cannot convert from Class
     
       to Class
      
       		*		Class
       
         genericNameer = int.class;		 */		Class
         generic = int.class;		/**		 * 接受继承自Number的类型 的 class，而不是继承与Number.class的 Class类型		 */		Class
         bounded = int.class;		Building b = new House();		Class
        
          houseType = House.class;		houseType.cast(b);		ClassTest(houseType);	}	public static void ClassTest(Class
          clazz) {		try {			Object obj = clazz.newInstance();			if(obj instanceof House) {				System.out.println("obj instanceof House=true");				House house = clazz.cast(obj);				house.ff();			}else if(obj instanceof Building) {				System.out.println("obj instanceof Building=true");				Building b = (Building)obj;				b.f();			}			if(clazz.isInstance(obj)) {				System.out.println("House Instance");			}					} catch (InstantiationException e) {			e.printStackTrace();  		} catch (IllegalAccessException e) {			e.printStackTrace();		} 	}}class Building{	public void f() {		System.out.println("Building f()");	}}class House extends Building{	@Override	public void f() {		System.out.println("House f()");	}	public void ff() {		System.out.println("House ff()");	}};