Class can't find anothe class in same directory.

Hi
I'm using javac and appletviewer and I keep getting this strange reaction.
I've got a couple of classes, one extends the other. ie:
class a
class b extends a
Now when I compile b it says it cannot find class a. Both of these java files are in the same directory. Class a compiles fine on its own but I can't compil b.
Also, when compiling a with the statement:
package c
as the first statement and then trying to run the compiled class in the appletviewer, I get the following error:
java.lang.NoClassDefFoundError: a (wrong name: c/a)
The Applet window comes up but with applet not initialised.
Can anyone help with this? I purposely didn't put up the code because I figured it would be unnecessary.
Thanks
allan

Yep, that solved the compiling error. Thanks.
Any ideas about the applet viewer problem? Or where I can look for an answer?
allan

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Class can't find anothe class in same directory.

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