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What is the actual error message? Please copy and paste it here.

Recommended reading: "Hello World!" for Microsoft Windows (The Java™ Tutorials > Getting Started > The "Hello World!" Application)

Please don't post screenshots of your code or error message- just copy and paste them here. Don't forget the highlight tags.

Did you do as your instructor asked? Did you compile your code? It...

If you want help, you should provide an SSCCE that demonstrates the problem. Is this an eclipse problem, or a general problem? What happens when you compile from the command line?