Import statement not working

Question

i created a package named "pkg1", it contains 4 classes named
1) Base
2) Subclass1 (extends Base)
3) Subclass2 (extends Subclass1)
4) Subclass3 (extends Subclass2)
now when i try to use the package using
import pkg1.*
and in main method, if i write,
Subclass3 obj = new Subclass3();
It does not work, error msg says "makes sure Subclass3 is in the correct sub-directory."
However, when i tried
import pkg1.Subclass3;
It worked fine, Why is then import pkg1.* not working??

Answer 1

I don't think that's going to help.
Try and see.
When the java compiler looks for a class
pkg1.Subclass1 it looks for pkg1\Subclass1.java
relative to the current directory and
pkg1\Subclass1.class relative to each directory on
the classpath.
When the javac compiler (at least version 1.4) looks for a dependent class, it looks in the Classpath directories. It only looks relative to the current directory if the current directory is in the Classpath. When it looks for a dependent class, it looks for both .java and .class files. If it only finds a .java file or the .java file is newer than a .class file, it will try to compile the file.
You need to compile from the directory above
pkg1, in this case (unfortunately) d:\
This makes it sound like it is a requirement to compile from the directory. It isn't required.