package reflect;

import java.lang.reflect.Field;

/**

* @author ： CodeWater

* @create ：2022-03-03-13:44

* @Function Description ：含有declared的，连私有都能获取

* Class对象功能：

* * 获取功能：

* 1. 获取成员变量们

* * Field[] getFields()

* * Field getField(String name)

* <p>

* * Field[] getDeclaredFields()

* * Field getDeclaredField(String name)

*/

public class ReflectDemo02 {

public static void main(String[] args) throws Exception {

Class personClass = Person.class;

//1.获取成员变量，只有public可以

Field[] fields = personClass.getFields();

for (Field field : fields) {

System.out.println(field);

}

//2.get member variable a

Field a = personClass.getField("a");

Person p = new Person();

Object value = a.get(p);

System.out.println(value);

//set a

a.set(p, "张三");

System.out.println(p);

System.out.println("=====================");

//获取成员变量，不考虑修饰符

Field[] declaredFidles = personClass.getDeclaredFields();

for (Field declaredField : declaredFidles) {

System.out.println(declaredField);

}

System.out.println("==============");

//获取单个

Field d = personClass.getDeclaredField("d");

//忽视访问权限

d.setAccessible(true);

//p是Person，前面定义了

Object value2 = d.get(p);

System.out.println(value2);

}

}