Summer and wintertime JAVA [closed] - java

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i have this code:
Locale locale1 = Locale.GERMANY;
TimeZone tz1 = TimeZone.getTimeZone("Europe/Berlin");
Calendar cal = GregorianCalendar.getInstance(tz1,locale1);
cal.add(Calendar.HOUR, 1);
When the time switch from winter to summer my time is not correct anymore. Is there any workaround or solution this problem?
Thanks.


You may use this inDaylightTime : link to check whether you are in daylight saving. For example :
if (tz1.inDaylightTime) cal.add(Calendar.HOUR,1);

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Get date format with time zone as added hours [closed]

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How to get the current date time in JMeter formatted like this
2021-03-02T07:57:19+01:00
I have used "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" but it doesn't format as expected

You should use yyyy-MM-dd'T'HH:mm:ssZ or yyyy-MM-dd'T'HH:mm:ssXXX format, for example with time function
${__time(yyyy-MM-dd'T'HH:mm:ssXXX)}
Z Time zone RFC 822 time zone -0800
X Time zone ISO 8601 time zone -08; -0800; -08:00

java - convert millisecond to localtime [closed]

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I need to convert millisecond value to local time
For example, we have this value 1601981597562 when I convert it to Date in UTC it gives me the day will be Oct 10 but in local time it should be Oct 11
new DateTime(1601981597562)
Ref
My question whats the way to convert that timestamp to the local time to be Oct 11 instead of Oct 10

You should use date for this .
Add these codes into your activity.
String localTime = String.valueOf(new Date(timeMillis));

You can use Date to convert Epoch to UTC like so:
long epoch = System.currentTimeMillis();
Date date = new Date(epoch);
System.out.println(date);
Ensure that Date is java.util.Date

Joda time local zone to utc conversion [closed]

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I am trying gmt asia/kolkata timemillis convert to utc timemillis but it returns same value. Environment time is asia/kolkata

The epoch is time zone independent. So you should get the same number of milliseconds since the epoch back no matter which time zone you convert to.
So the result you got is correct.

You can try as this
Instant date = Instant.ofEpochMilli(1549362600000l);
LocalDateTime utc = LocalDateTime.ofInstant(date, ZoneOffset.UTC);
You need not to use Joda time api has moved to java 1.8 has implemented the same you can use above same from java.time package

Conversion of milliseconds to a specific date format [closed]

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How can I convert the current time in milliseconds, which is a Long, to a date in specific format?
The format that I need is yyyy-MM-dd HH:mm. This should be of type Date, not String.

You are confused. The type Date is a number of milliseconds since January 1 1970 midnight UTC. It has no inherent format. There is a default system format for a Date, but you cannot alter it. You will need to format your Date as a String if you need that particular String format.

Parse String to Date in java [closed]

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Closed 9 years ago.
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I have date like mm-dd-yyy in string format and I am trying to convert the same to Date object in java,
Two ways I tried in
sending the date format as "mm-dd-yyy" which is returning the wrong
date, it always returns month Jan even though the month in the
string is not "01"
sending the date format as "MM-dd-yyy" will return the correct date
as expected.
But I want to understand why the first approach returning wrong?
Can any body tell me the reason.

See the Format
M Month in year
m Minute in hour

Date and time formats are specified by pattern strings. Within the pattern strings, m is interpreted as minute in hour, and M is interpreted as Month in year.
Perhaps you should read JavaDoc API spec.
And you should check that the year of parsed date object is what you intended to. Since your string is MM-dd-yyy, "02-12-014"(which should be 2014-02-12 is actually interpreted as 0014-02-12, which can be not your intended result.

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