Kathleen Chapman

It wouldn't matter that you typed that the file was ThreadTester.java . The name of your file and the name of your public class must be the same.

ex:
If your class was:

public class TestClass{}

Then your file must be named:

TestClass.java

So in the case of the source code posted the name of the file should be. C:\javaprj\ThreadTester.java .

Hope this helps.

I think that if every 12 year old could pass it that would be a problem. As long as it is only one I won't feel bad that I have to keep studying.