java错误找不到符号是什么意思

Question

public class ParamTest3
{
public void change(Person person,Person person2)
{
person.name = "lisi";
person2.name = "wangwu";
}

public static void main(String[] args)
{
Person person = new Person();
Person.name = "zhangsan";
Person person2 = person;
ParamTest3 test = new ParamTest3();
test.change(person,person2);
System.out.println(person.name);
}

}
大家帮忙看看这个程序，初学者，什么都不会，谢谢啦！