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Old August 19th, 2003, 11:20 AM
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Default Help on Packages

I am working the "Try it" in chap 7 of this book. I created a book class which is stored in classes\com\wrox\library.

when I try to create subclasses, ChildrenBook and TechnicalBook I include: package com.wrox.library;

but I get this error message when I compile:

C:\Apache\Tomcat 4.1\webapps\begjsp-ch07\WEB-INF\classes\com\wrox\library\ChildrenBook.java:3: cannot resolve symbol
symbol : class Book
location: class com.wrox.library.ChildrenBook
public class ChildrenBook extends Book
                                  ^
1 error

Tool completed with exit code 1

Thanks for any help


 
Old September 28th, 2003, 11:28 PM
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The problem is with your classpath that you include with the command to compile ChildrenBook.java. From your library folder, execute the javac command like this "javac -classpath C:\Apache\Tomcat~1\webapps\begjsp~1\WEB-INF\classes\com\wrox ChildrenBook.java". By using everything between the quotes, you're telling the compiler that the package 'library' (which contains the class Book.class) to start in the 'wrox' folder, then from there look for the 'library' package as it says to in the ChildrenBook class. By including the classpath parm, you're giving it the beginning location on where to find Book.class. Without specifying the starting point, it won't know to begin looking for 'library'....good luck!





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