RTTI-CLASS

 package com.xt.test;

 interface Test1Interface {

 }

 interface Test2Interface {

 }

 class Test1 implements Test1Interface, Test2Interface {
     static {
         System.out.println("Test1--Class");
     }

     public void print() {
         System.out.println("print111!");
     }
 }

 public class ClassTest {
     public static void main(String[] args) {
         try {
             Class<?> c = Class.forName("com.xt.test.Test1");
             Test1 cc = (Test1) c.newInstance();
             cc.print();
             System.out.println("isInterface:" + c.isInterface());
             // 打印类加载器的路径
             System.out.println("ClassLoader->Path:"
                     + c.getClassLoader().getResource("").getPath());
             // 打印class文件的路径
             System.out.println("Class->Path:" + c.getResource("").getPath());
             // 含包名的类名
             System.out.println("CanonicalName:" + c.getCanonicalName());
             System.out.println("----------------------");
             // 实现的接口
             for (Class<?> cla : c.getInterfaces()) {
                 System.out.println("Class->Path:"
                         + cla.getResource("").getPath());
                 System.out.println("isInterface:" + cla.isInterface());
             }
             // 得到父类，打印父类的名字
             Class<?> spuerClass = c.getSuperclass();
             System.out.println("superClassName:" + spuerClass.getName());
             System.out.println("----------------------");
             // Class.cast用法
             Number n = new Integer(5);
             Class<Integer> i = Integer.class;
             Integer ii = i.cast(n);
             System.out.println(ii);
         } catch (ClassNotFoundException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (InstantiationException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } catch (IllegalAccessException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
 }

类字面常量XXX.class比Class.forName("")更安全，更效率,注意，使用.class来创建对Class对象的引用的时候不会自动初始化该Class对象.