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[Jersey] Hello ,somebody could help me why this code always returning 404?

From: Redmond_at_139. <redmond_at_139.com>
Date: Fri, 2 Oct 2015 23:36:08 +0800 (CST)

hello sir/madam
   this is my program in github,https://github.com/abcdef123ghi/jerseytest ,there are no errors in Eclipse,However it always returing the 404,any help would be appeciated.Although I'm not familar with Java,but with Google & Jersey docs,I have written the code and there are no errors,but it can't be started.I'm very confused.
regards
Ken