编写一个类，增加一个实例方法 打印字符串 用反射

package com.heima.test;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class Test9 {

/**编写一个类，增加一个实例方法 打印字符串  用反射
* @param args
* @throws ClassNotFoundException
* @throws IllegalAccessException
* @throws InstantiationException
* @throws SecurityException
* @throws NoSuchMethodException
* @throws InvocationTargetException
* @throws IllegalArgumentException
*/
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, SecurityException, IllegalArgumentException, InvocationTargetException {
Class clazz = Class.forName("com.heima.test.Print");
Constructor con = clazz.getDeclaredConstructor();
Print p = (Print)con.newInstance();
Method me = clazz.getMethod("run", null);
me.invoke(p, null);
}

}
class Print{
public void run(){
System.out.println("1231212");
}
}