Symbol not found

[john sayeau]

Hi. I'm trying to get a class to compile but it keeps getting Symbol not found:

Here is the directory tree of the project under /usr/tomcat/webapps/

 
aListenerEx/
`-- WEB-INF
    `-- classes
        `-- com
            `-- example
                |-- Dog.class
                |-- Dog.java
                |-- ListenerTester.java
                `-- MyServletContextListener.java
   

here is the dog class :

  
package com.example;

public class Dog{
    private String breed;
    
    public Dog(String breed){
        this.breed = breed;
    }
    
    public String getBreed(){
        return this.breed;
    }
}

  

Here is the class I'm tring to compile:

  
package com.example;
import javax.servlet.*;


public class MyServletContextListener implements ServletContextListener{
    public void contextInitialized(ServletContextEvent event){
        ServletContext sc = event.getServletContext();
        String dogBreed = sc.getInitParameter("breed");
        Dog d = new Dog("dogBreed");
        sc.setAttribute("dog", d);
        
    }
    
    public void contextDestroyed(ServletContextEvent event){
        //nothing to do this time
    }
}
 

I try to compile it with this command:

javac -classpath WEB-INF/classes/com/example/:/usr/tomcat/lib/servlet-api.jar WEB-INF/classes/com/example/MyServletContextListener.java


and get this:

WEB-INF/classes/com/example/MyServletContextListener.java:10: cannot find symbol
symbol : class Dog
location: class com.example.MyServletContextListener
Dog d = new Dog("dogBreed");
^
WEB-INF/classes/com/example/MyServletContextListener.java:10: cannot find symbol
symbol : class Dog
location: class com.example.MyServletContextListener
Dog d = new Dog("dogBreed");


I've tried variations of the commad. I don't quite understand the arguments for -classpath I guess.

[marc weber]

john sayeau wrote: ...I try to compile it with this command:

javac -classpath WEB-INF/classes/com/example/:/usr/tomcat/lib/servlet-api.jar WEB-INF/classes/com/example/MyServletContextListener.java
...

Your Dog class is part of the package com.example, so its qualified name is "com.example.Dog," which is in the directory "classes." That's the directory you should specify in your classpath.

For reference, see Understanding the class path and package names.

[john sayeau]

Thanks! That did the trick.