Java DateFormat format and parse gives unexpected result

问题

I'm getting unexpected output when running following code,

DateFormat df = new SimpleDateFormat("YYYY-MM-dd");
Date date = df.parse("2012-06-23");
System.out.println(df.format(date));

Output : 2012-01-01

I'm expecting 2012-06-23 as output,what am i doing wrong ?

回答1:

yyyy should be all lowercase, try that and see if it makes a difference...

回答2:

Refer this Date & time in Java. You'll get the date format used

Use 'y' instead of 'Y'.

DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date date = df.parse("2012-06-23");
System.out.println(df.format(date));

来源：https://stackoverflow.com/questions/11162404/java-dateformat-format-and-parse-gives-unexpected-result