JAVA 反射练习

package Reflects;

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

/**
 * 通过反射实现如下操作
 * Actor  a = new Actor
 * a.name = "张三";
 * a.age = 20;
 * a.sex ="男";
 * System.out.println(a);
 */

public class ReflectDemo{
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException, NoSuchFieldException {
        Class<?> objClass = Class.forName("Reflects.Actor");  //类对象
        Constructor<?> constructor = objClass.getConstructor();//获取构造方法
        Object o = constructor.newInstance();//生成对象

        Field name = objClass.getField("name");
        Field age = objClass.getField("age");
        Field sex = objClass.getField("sex");
        name.set(o,"张三");
        age.set(o,20);
        sex.set(o,"男");
        System.out.println(o);

    }
}