Question

我正在学习如何在YouTube视频后实现界面。他运行我发布的代码，然后运行相同的代码。他的编译和打印时我给了我错误代码：

Machine startedException in thread "main" java.lang.NoClassDefFoundError: 
 Person
at App.main(App.java:9)
 Caused by: java.lang.ClassNotFoundException: Person
at java.base...(etc.)

这是因为我在运行Eclipse时运行jGrasp吗？教程程序的代码如下：

public class App{
  public static void main(String[] args){

 Machine mach1 = new Machine();
    mach1.start();

 Person person1 = new Person("Bob");
    person1.greet();

 Info info1 = new Machine();
    info1.showInfo();

 Info info2 = person1;
    info2.showInfo();
 }//end of main class 
}//end of App class
public class Machine implements Info{
  private int id = 7;

  public void start(){
    System.out.print("Machine started");
  }
  public void showInfo(){
   System.out.println("Machine id is " + id);
  }
}//end of machine class 
public class Person implements Info{
  private String name;

  public Person(String name){
    this.name = name;
  }
  public void greet(){
    System.out.println("Hello there");
  }
  public void Info(){
    System.out.print("Person name is " + name);
  }
}//end of person class
public interface Info{
  public void showInfo();
}//end of interface

我的jGrasp IDE是否对此负责？

0 个答案: