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"it"?
Sounds like you need to study how to use your IDE.

What are you trying to do with the java command?
Go to this site and read about the java and the javac commands:
Java SE 6 Documentation

Then I would expect the compiler to be outputting error messages.
Copy and paste them here if you want help fixing them or understanding them.

Yes that is an issue if you don't have one. Do you have one that works for you?

What does this mean?

Are you getting errors from the javac/compiler when it compiles your program?
Or are you having problems executing the javac command? The OS can't find it.

That says that the java program did NOT find the class: AscendingOrder

Where is the AscendingOrder.class file?
How are you trying to execute your program?
Are you entering the java command on a...

That sounds like an execution error not a compile error.
Please copy and paste here the full text of the error message. The message says what is wrong and where.
To copy the contents of the command...