為什么同一個 package 中的班級沒有相互協作？

Question

I wanted to create a class named Person in package com.bazlur.java , then create object for Person class in another class named PersonDemo in the same package com.bazlur.java . 但問題是當我運行代碼時出現錯誤......你能告訴我，我應該如何解決這個問題嗎？

錯誤：

PersonDemo.java:6: error: cannot find symbol
        Person person1 = new Person();      
        ^
  symbol:   class Person
  location: class PersonDemo
PersonDemo.java:6: error: cannot find symbol
        Person person1 = new Person();
                             ^
  symbol:   class Person
  location: class PersonDemo
PersonDemo.java:7: error: cannot find symbol
        Person person2 = new Person("Swarna",22,"*********");
        ^
  symbol:   class Person
  location: class PersonDemo
PersonDemo.java:7: error: cannot find symbol
        Person person2 = new Person("Swarna",22,"*********");
                             ^
  symbol:   class Person
  location: class PersonDemo
4 errors

PersonDemo.java Person.java

Answer 1

你想為此編譯多個 Java 文件。

javac Person.java PersonDemo.java

文件的路徑取決於您在命令行中的當前位置。 所以，如果你在不同的路徑上，你將不得不傳遞像javac com/bazlur/java/Person.java這樣的位置

Answer 2

我認為你需要添加

import com.bazlur.java.person;

給你的人演示 class。

嘗試一下！