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Posted to issues@commons.apache.org by "Gary D. Gregory (Jira)" <ji...@apache.org> on 2025/03/25 12:47:00 UTC
[jira] [Comment Edited] (LANG-1767) FastDateFormat.parse can not recgnoize "CEST" Timezone

    [ https://issues.apache.org/jira/browse/LANG-1767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17938198#comment-17938198 ] 

Gary D. Gregory edited comment on LANG-1767 at 3/25/25 12:46 PM:
-----------------------------------------------------------------

[~sustech-whl] 

Your example mixes timezone IDs and Locales: The name you are using is in English, and the Locale is German.
This works:
{code:java}
    @Test
    public void testParseCentralEuropeanSummerTime() throws ParseException {
        assertNotNull(FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss", Locale.GERMANY).parse("26.10.2014 02:00:00"));
        assertNotNull(FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss z", Locale.US).parse("26.10.2014 02:00:00 CEST"));
        assertNotNull(FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss z", Locale.GERMANY).parse("26.10.2014 02:00:00 MESZ"));
    }
{code}

See {{FastDateFormatTest.testParseCentralEuropeanSummerTime()}}


was (Author: garydgregory):
[~sustech-whl] 

Your example mixes timezone IDs and Locales: The name you are using is in English, and the Locale is German.
This works:
{code:java}
    @Test
    public void testParseCentralEuropeanSummerTime() throws ParseException {
        String dateString = "26.10.2014 02:00:00";
        FastDateFormat formatter = FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss", Locale.GERMANY);
        assertNotNull(formatter.parse(dateString));
        dateString = "26.10.2014 02:00:00 CEST";
        formatter = FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss z", Locale.US);
        assertNotNull(formatter.parse(dateString));
        dateString = "26.10.2014 02:00:00 MESZ";
        formatter = FastDateFormat.getInstance("dd.MM.yyyy HH:mm:ss z", Locale.GERMANY);
        assertNotNull(formatter.parse(dateString));
    }
{code}


> FastDateFormat.parse can not recgnoize "CEST" Timezone
> ------------------------------------------------------
>
>                 Key: LANG-1767
>                 URL: https://issues.apache.org/jira/browse/LANG-1767
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.*
>    Affects Versions: 3.17.0
>            Reporter: Wang Hailong
>            Priority: Major
>
> Hear are two examples which can reproduce the situation:
>  
> {color:#bbb529}@Test
> {color}{color:#cc7832}public void {color}{color:#ffc66d}testCestTimeZoneParsing{color}() {color:#cc7832}throws {color}ParseException {
> {color:#808080}// Data Preparation
> {color}{color:#808080} {color}String dateString = {color:#6a8759}"26.10.2014 02:00:00 CEST"{color}{color:#cc7832};
> {color}{color:#cc7832} {color}{color:#808080}// API Invocation
> {color}{color:#808080} {color}FastDateFormat formatter = FastDateFormat.getInstance({color:#6a8759}"dd.MM.yyyy HH:mm:ss z"{color}{color:#cc7832}, {color}Locale.{color:#9876aa}GERMANY{color}){color:#cc7832};
> {color}{color:#cc7832} {color}Date parsedDate = formatter.parse(dateString){color:#cc7832};
> {color}}
> {color:#bbb529}@Test
> {color}{color:#cc7832}public void {color}{color:#ffc66d}testConflictingTimeZonePatterns{color}() {color:#cc7832}throws {color}ParseException {
> {color:#808080}// Data Preparation
> {color}{color:#808080} {color}String dateString = {color:#6a8759}"26.10.2014 02:00:00 CEST+0200"{color}{color:#cc7832};
> {color}{color:#cc7832} {color}{color:#808080}// API Invocation
> {color}{color:#808080} {color}FastDateFormat formatter = FastDateFormat.getInstance({color:#6a8759}"dd.MM.yyyy HH:mm:ss zZ"{color}{color:#cc7832}, {color}Locale.{color:#9876aa}GERMANY{color}){color:#cc7832};
> {color}{color:#cc7832} {color}Date parsedDate = formatter.parse(dateString){color:#cc7832};
> {color}}



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