could not find Symbol,

Question

public class TestPerson{
    public static void main(String[]args){
        //想使用一个类，必须（1）先创建类的对象
        Person per=new Person();//类是对象的类型，per的类型是Person
        //（2）对象名.属性
        per.name="Zhang San";
        per.age=20;
        per.sex="Male";
        //(3)对象名.方法名（）
        per.introduce();

    }
}


//TestPerson.java:4: error: cannot find symbol
        Person per=new Person();//类是对象的类型，per的类型是Person
        ^
  symbol:   class Person
  location: class TestPerson
TestPerson.java:4: error: cannot find symbol
        Person per=new Person();//类是对象的类型，per的类型是Person
                       ^
  symbol:   class Person
  location: class TestPerson
2 errors

```

Answer 1

Person类的定义是要你自己写的,你自己先写好一个person类放在同一个包下了么
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