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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.

Summer and wintertime JAVA [closed]

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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);

Formula of currentTimeMillis() in java? [closed]

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To my knowledge, System.currentTimeMillis()/1000 can show the current time in seconds since
1970-1-1 00:00:00 (YY-MM-DD HH:mm:ss)
For example
2013-10-12 21:30:00 (YY-MM-DD HH:mm:ss)
= 13815846XX (not sure whats X for)
I was wondering how to calculate it. Thanks a lot!!!!

System.currentTimeMillis() just returns the number of milliseconds since the Unix epoch (January 1st 1970, midnight UTC), as a long.
Converting that value into a string is normally the job of something like SimpleDateFormat, via Calendar and Date. Alternatively, look at Joda Time for a nicer date/time API.
If you want to start with a date and get the number of milliseconds since the Unix epoch, you'd use Calendar, set the appropriate fields and then use Calendar.getTimeInMillis(). (Or again, use Joda Time.) Be careful about time zone interactions.
You can use Epoch Converter to check your computations.
A value such as 1381584600 is most likely to be a Unix timestamp, which is the number of seconds (not milliseconds) since the Unix epoch - hence the division by 1000 that you mention.
If this doesn't tell you what you need, please ask a more precise question.