Failed to concisely convert String with milliseconds to Date type in Java

Question

Please find the following codes:

@RunWith(JUnit4.class)
public class TestTimestamp {

    private final static SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm:ss.SSSSSS");
    private final static SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd HH:mm:ss");

    @Test
    public void test() throws ParseException {
        getTimestamp("20140512 16:13:09.493166 +0800", sdf);
        getTimestamp("20140515 15:04:42.690873 +0800", sdf);
        getTimestamp("20140515 15:04:45.159977 +0800", sdf);

        getTimestamp("20140512 16:13:09.493166 +0800", df);
        getTimestamp("20140515 15:04:42.690873 +0800", df);
        getTimestamp("20140515 15:04:45.159977 +0800", df);
    }

    private void getTimestamp(String time, SimpleDateFormat sdf) throws ParseException {
        System.out.println("Time to convert: " + time);
        String[] tmp = time.split("\\+");
        String str = tmp[0].trim();
        System.out.println(str);
        System.out.println(sdf.parse(str));
        System.out.println();
    }

}

The output with sdf is very strange and the output with df is correct:

//Wrong result with sdf
Time to convert: 20140512 16:13:09.493166 +0800
20140512 16:13:09.493166
Mon May 12 16:21:22 CST 2014

Time to convert: 20140515 15:04:42.690873 +0800
20140515 15:04:42.690873
Thu May 15 15:16:12 CST 2014

Time to convert: 20140515 15:04:45.159977 +0800
20140515 15:04:45.159977
Thu May 15 15:07:24 CST 2014


//Correct result with df
Time to convert: 20140512 16:13:09.493166 +0800
20140512 16:13:09.493166
Mon May 12 16:13:09 CST 2014

Time to convert: 20140515 15:04:42.690873 +0800
20140515 15:04:42.690873
Thu May 15 15:04:42 CST 2014

Time to convert: 20140515 15:04:45.159977 +0800
20140515 15:04:45.159977
Thu May 15 15:04:45 CST 2014

Could you please help me out?

Answer 1

a millisecond would be SSS being a thousandth. The 159977 length would exceed this being a microsecond

try

yyyyMMdd HH:mm:ss.SSS