//体会反射的动态性

@Test

public void test2(){

    for(int i = 0;i < 100;i++){

        int num = new Random().nextInt(3);//0,1,2

        String classPath = "";

        switch(num){

            case 0:

                classPath = "java.util.Date";

                break;

            case 1:

                classPath = "java.lang.Object";

                break;

            case 2:

                classPath = "com.atguigu.java.Person";

                break;

        }

        try {

            Object obj = getInstance(classPath);

            System.out.println(obj);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

/*

创建一个指定类的对象。

classPath:指定类的全类名

 */

public Object getInstance(String classPath) throws Exception {

   Class clazz =  Class.forName(classPath);

   return clazz.newInstance();

}