反射对于成员变量的使用

package Fanshe;

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

public class Fanshedeom3 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, NoSuchFieldException, IllegalAccessException, InvocationTargetException, InstantiationException {
        Class<?> clss = Class.forName("Fanshe.Student");
        //通过成员变量设置值
        //获取所有成员变量  遍历一遍
        Field[] declaredFields = clss.getDeclaredFields();
        for (Field a : declaredFields) {
            System.out.println(a);
        }
        //获得指定成员变量
        Field namefield = clss.getDeclaredField("name");
        //无参构造
        Constructor<?> stu = clss.getConstructor();
        Object obj = stu.newInstance();
        //设置stu的name值 这里也就是namefield的值
        namefield.set(obj,"李丹"); //这里的意思是对obj对象的namefield的属性设置值为“李丹”；
        System.out.println(obj);

    }
}