About Package file inter-access

[Mikey Chen]

two file lie on the same dir(f:\javapackage).
the content of bbb.java file is:

package javapackage;
class bbb {
public bbb() {
System.out.println("bbb");
}
}
 

the content of aaa.java file is:

package javapackage;
public class aaa {
public static void main(String[] args) {
bbb b;
System.out.println("Hello World!");
}
}

When I compile the aaa.java file, I get the following message:

---------- Compile (javac.exe) ----------
aaa.java:5: cannot resolve symbol
symbol : class bbb
location: class javapackage.aaa
bbb b;
^
1 error

I remember that classes in the same package can inter-access. Why can the aaa class not get the bbb class in this situation? What's wrong with it?
[ October 22, 2002: Message edited by: Mikey Chen ]
[ October 22, 2002: Message edited by: Mikey Chen ]

[William Barnes]

Try compiling the bbb.java first or try compiling with a wildcard.

javac *.java

[Rene Larsen]

Put a .(dot) in your CLASSPATH
Rene

[Mikey Chen]

Originally posted by William Barnes:
Try compiling the bbb.java first or try compiling with a wildcard.

javac *.java

1.I have compiled bbb.java but get the same result.
2.Using "javac *.java" goes well. However, if there have many files and only one file has been modified, I think recompiling all files will get low performance.

Originally posted by Rene Larsen:
Put a .(dot) in your CLASSPATH
Rene

I put a .(dot) in my CLASSPATH, but get same result.

[Mikey Chen]

My compile environment maybe go ill.
I use

  javac -classpath f:\javapackage aaa.java

also get the same result.
Can you tell me what's the problem?

[Paulo Salgado]

Since you have the

 package javapackage;

in your classes and the classpath set to
f:\javapackage, javac is probably trying to find your classes at f:\javapackage\javapackage.
Try to change you classpath to f:\ only or
remove the package statements from both classes to use the default package (the classes directory).

[Mikey Chen]

Paulo Salgado:
Thanks!
I add ".\.." to my CLASSPATH. All go well.
Thanks William and Rene for your replies.

[Mikey Chen]

Hi all, there has another problem.
I have compiled the two files successfully. But I can not excute the aaa.class file.
After typing following command

f:\javapackage>java aaa  

I got the following error message.

---------- Run (java.exe) ----------
java.lang.NoClassDefFoundError: aaa (wrong name: javapackage/aaa)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
Exception in thread "main"
Output completed (0 sec consumed) - Normal Termination

Why can VM not find the class file?
Thanks!

[Dirk Schreckmann]

Make your working directory the parent directory of the package. So, try:
f:> java javapackage.aaa
What did you do to do to compile the files successfully?

[Mikey Chen]

Originally posted by Dirk Schreckmann:
Make your working directory the parent directory of the package. So, try:
f:> java javapackage.aaa
What did you do to do to compile the files successfully?

Thanks!
I execute it successfully.
ps. I can't understand the question of you. Maybe the answer lies what I have posted above.

[Dirk Schreckmann]

Nevermind. You already answered it. Thanks.
I add ".\.." to my CLASSPATH. All go well.