java - Convert date formats for storage -

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all of code formats , displays dates this:

   3-1-2011    3-15-2011    12-1-2011    12-15-2011

what's best way format yyyy-mm-dd storage in sqlite db?

try 

   string inputdate =  "12-15-2011";    dateformat df = new simpledateformat("yyyy-mm-dd");    date date = df.parse(inputdate);

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