java反射调用私有变量demo

import java.lang.reflect.Field;  
import java.lang.reflect.Method;  
  
public class Person {  
    private String name;//私有属性  
    public String address;  
    public Person(String name){  
        this.name=name;  
    }  
    private void setAddress(String address){ //私有方法  
        this.address=address;  
    }  
    public static void main(String[] args) {  
        try{  
            Person person=new Person("zhangsan");  
            Class
 
   cls=Person.class;  
            //获得私有方法  
            Method method=cls.getDeclaredMethod("setAddress", new Class[]{String.class});  
            //设置私有方法可以被访问  
            method.setAccessible(true);  
            //调用私有方法  
            method.invoke(person, new Object[]{"BJUT"});  
            System.out.println(person.address);//输出BJUT  
              
            //访问私有变量  
            Field field=cls.getDeclaredField("name");  
            field.setAccessible(true);  
            System.out.println(field.get(person));//输出zhangsan  
              
        }catch(Exception ex){  
            ex.printStackTrace();  
        }  
          
    }  
}