package problems

[marilyn murphy]

Every time I think I understand this, I find again that I don't.

<font size=2.5>// Filename; SuperclassX.java
  
public class SuperclassX
{
    int superclassVarX;
  
    protected void superclassMethodX()
    {
    }
}
  
// Filename SubclassY.java
package packageY;
  
public class SubclassY extends SuperclassX
{
    SuperclassX objX = new SubclassY();
    SubclassY objY = new SubclassY();
    void subclassMethodY()
    {
        objY.superclassMethodX();
//       int i = objY.superclassVarX;
    }
}

SuperclassX.java and SubclassY.java are both in C:\Java. No problem compiling SuperclassX.java, however SubclassY.java won't compile.
C:\Java\SubclassY.java:4: cannot resolve symbol
symbol : class SuperclassX
location: class packageY.SubclassY
public class SubclassY extends SuperclassX
^
I have directory C:\Java\packageY and my classpath includes it. I've tried C:\Java\javac SubclassY.java
I've tried C:\Java\packageY\javac SubclassY.java

Well, I won't tell you what all I tried, but nothing works. What am I doing wrong?

[Kris Nelson]

My guess is that SubclassX (EDITED, I meant this to be SuperclassX, sorry) has default (or package) visibility and cannot be accessed by other classes outside the SAME default package.
------------------
WebNelly.com
Java/XML Web Development
Check it out! http://www.webnelly.com
[This message has been edited by Kris Nelson (edited November 09, 2001).]

[marilyn murphy]

There is no SubclassX. SuperclassX is public.

[Junilu Lacar]

The problem is that you declare SubclassY as belonging to packageY while SuperclassX does not have a package declaration making it belong to the DEFAULT package.
These are your options :

• put the same package declaration in SuperclassX to make it belong in packageY as well
  
• remove the package declaration in SubclassY to make it belong to the default package as well.
  

If you choose the first option, you may have to compile with the -sourcepath and -d options (see the help by typing just 'javac') if your source files are in C:\Java. To avoid the hassle of having to deal with the options, just put your source files in a directory with the same name as the package they belong to.
A third option: you declare the classes to belong to different packages (say packageX for SuperclassX). You must then include the statement
import packageX.*;
in SubclassY.java so that it can "see" SuperclassX.
HTH
------------------
Junilu Lacar
Sun Certified Programmer for the Java� 2 Platform
[This message has been edited by JUNILU LACAR (edited November 09, 2001).]

[marilyn murphy]

I thought if I put it in the default package I would not have to import it.

[Junilu Lacar]

Originally posted by marilyn murphy:
I thought if I put it in the default package I would not have to import it.

If you put it in the same package, you won't have to import it.

------------------
Junilu Lacar
Sun Certified Programmer for the Java� 2 Platform

[marilyn murphy]

Is there any way to import the default package?