java.time
Those java.util.Date answers at the top need to go. Here's some code I wrote that deals with different formats. It's also easier to go with a working example:
package com.brian.TimeZoneUtil;import java.time.*;import java.time.format.*;import java.time.LocalDateTime;public class TimeZoneConversion { public static void main(String[] args) { String inSlashDateString = "10/31/201100:00:00"; String inHyphenDateString = "2011-10-31T01:01:01"; String inEpochDateString = "1687170164410"; DateTimeFormatter slashFormatter = DateTimeFormatter.ofPattern("MM/dd/yyyyHH:mm:ss"); DateTimeFormatter hyphenFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss"); ZonedDateTime epochDateTime = Instant.ofEpochMilli(Long.parseLong(inEpochDateString)).atZone(ZoneId.of("America/Indiana/Indianapolis")); System.out.println(DateTimeFormatter.ofPattern("yyyyMMdd HH:mm:ss").format( LocalDateTime.parse(inSlashDateString +"00:00:00", slashFormatter))); System.out.println(DateTimeFormatter.ofPattern("yyyyMMdd HH:mm:ss").format( LocalDateTime.parse(inHyphenDateString, hyphenFormatter))); System.out.println(epochDateTime.format(DateTimeFormatter.ofPattern("yyyyMMdd HH:mm:ss"))); }}