The bug fix for
JDK-8032051
"ZonedDateTime" class "parse" method fails with short time zone offset ("+01")
fixed DateTimeFormatter.ISO_ZONED_DATE_TIME, but it seems like other DateTimeFormatter predefined formatters have the same problem, and need a similar fix. That is, any formatter that accepts an offset "+01:00" should also accept "+01" unless there's an industry spec to the contrary.

(as reported by a colleague)

import java.time.format.DateTimeFormatter;
import static java.time.format.DateTimeFormatter.ISO_DATE;
import static java.time.format.DateTimeFormatter.ISO_DATE_TIME;
import static java.time.format.DateTimeFormatter.ISO_OFFSET_DATE;
import static java.time.format.DateTimeFormatter.ISO_OFFSET_DATE_TIME;
import static java.time.format.DateTimeFormatter.ISO_OFFSET_TIME;
import static java.time.format.DateTimeFormatter.ISO_TIME;
import static java.time.format.DateTimeFormatter.ISO_ZONED_DATE_TIME;

public class DateTimeParse {
    static void test(DateTimeFormatter formatter, String x) {
        try {
            formatter.parse(x);
        } catch (Throwable t) { t.printStackTrace(); }
    }

    public static void main(String[] args) throws Throwable {
        // no exceptions
        test(ISO_ZONED_DATE_TIME, "2013-12-11T21:25:04.800842+01:00");
        test(ISO_ZONED_DATE_TIME, "2013-12-11T21:25:04.800842+01");
        test(ISO_OFFSET_DATE_TIME, "2013-12-11T21:25:04.800842+01:00");
        test(ISO_OFFSET_DATE_TIME, "2013-12-11T21:25:04.800842+01");

        // exceptions ...
        test(ISO_DATE_TIME, "2013-12-11T21:25:04.800842+01:00");
        test(ISO_DATE_TIME, "2013-12-11T21:25:04.800842+01");
        test(ISO_OFFSET_DATE, "2013-12-11+01:00");
        test(ISO_OFFSET_DATE, "2013-12-11+01");
        test(ISO_DATE, "2013-12-11+01:00");
        test(ISO_DATE, "2013-12-11+01");
        test(ISO_OFFSET_TIME, "21:25:04.800842+01:00");
        test(ISO_OFFSET_TIME, "21:25:04.800842+01");
        test(ISO_TIME, "21:25:04.800842+01:00");
        test(ISO_TIME, "21:25:04.800842+01");
    }
}


=>

java.time.format.DateTimeParseException: Text '2013-12-11T21:25:04.800842+01' could not be parsed, unparsed text found at index 26
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2049)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at DateTimeParse.test(DateTimeParse.java:13)
at DateTimeParse.main(DateTimeParse.java:26)
java.time.format.DateTimeParseException: Text '2013-12-11+01' could not be parsed at index 10
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at DateTimeParse.test(DateTimeParse.java:13)
at DateTimeParse.main(DateTimeParse.java:28)
java.time.format.DateTimeParseException: Text '2013-12-11+01' could not be parsed, unparsed text found at index 10
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2049)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at DateTimeParse.test(DateTimeParse.java:13)
at DateTimeParse.main(DateTimeParse.java:30)
java.time.format.DateTimeParseException: Text '21:25:04.800842+01' could not be parsed at index 15
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at DateTimeParse.test(DateTimeParse.java:13)
at DateTimeParse.main(DateTimeParse.java:32)
java.time.format.DateTimeParseException: Text '21:25:04.800842+01' could not be parsed, unparsed text found at index 15
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2049)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1874)
at DateTimeParse.test(DateTimeParse.java:13)
at DateTimeParse.main(DateTimeParse.java:34)