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javadatetimeformatter

Text '1/1/2020 12:12:12' could not be parsed at index 0 1/1/2020 12:12:12 MM/dd/yyyy HH:mm:ss

The below code throws error, not sure why 1 is not accepted as 01 and throws exception

failure Text '1/1/2020 12:12:12' could not be parsed at index 0
1/1/2020 12:12:12 MM/dd/yyyy HH:mm:ss

try {
    DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss", Locale.US)
        .withResolverStyle(ResolverStyle.STRICT);
    System.out.println("success " + dateFormatter.parse(1/1/2020 12:12:12));
} catch (Exception e) {
    System.out.println("failure " + e.getMessage());
}
Solution

  • DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss", Locale.US) accepts dates with exactly two places in Month and Day. For your input, DateTimeFormatter.ofPattern("M/d/yyyy HH:mm:ss", Locale.US), ResolverStyle.STRICT) is needed.