Java 8 How to convert String to LocalDate
Few Java examples show you how to convert a String to the new Java 8 Date API – java.time.LocalDate
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d/MM/yyyy"); String date = "16/08/2016"; //convert String to LocalDate LocalDate localDate = LocalDate.parse(date, formatter);
Refer to this official DateTimeFormatter JavaDoc for more date time formatter examples.
You may interest at this classic java.util.Date example – How to convert String to Date in Java
1. String = 2016-08-16
If the String is formatted like ISO_LOCAL_DATE, you can parse the String directly, no need conversion.
package com.mkyong.java8.date; import java.time.LocalDate; public class TestNewDate1 { public static void main(String[] argv) { String date = "2016-08-16"; //default, ISO_LOCAL_DATE LocalDate localDate = LocalDate.parse(date); System.out.println(localDate);
Output
2016-08-16
2. String = 16-Aug-2016
package com.mkyong.java8.date; import java.time.LocalDate; import java.time.format.DateTimeFormatter; public class TestNewDate2 { public static void main(String[] argv) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d-MMM-yyyy"); String date = "16-Aug-2016"; LocalDate localDate = LocalDate.parse(date, formatter); System.out.println(localDate); //default, print ISO_LOCAL_DATE System.out.println(formatter.format(localDate));
Output
2016-08-16 16-Aug-2016
3. String = 16/08/2016
package com.mkyong.java8.date; import java.time.LocalDate; import java.time.format.DateTimeFormatter; public class TestNewDate3 { public static void main(String[] argv) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("d/MM/yyyy"); String date = "16/08/2016"; LocalDate localDate = LocalDate.parse(date, formatter); System.out.println(localDate); System.out.println(formatter.format(localDate));
Output
2016-08-16 16/08/2016
4. String = Tue, Aug 16 2016
package com.mkyong.java8.date; import java.time.LocalDate; import java.time.format.DateTimeFormatter; public class TestNewDate4 { public static void main(String[] argv) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("E, MMM d yyyy"); String date = "Tue, Aug 16 2016"; LocalDate localDate = LocalDate.parse(date, formatter); System.out.println(localDate); System.out.println(formatter.format(localDate));
Output
2016-08-16 Tue, Aug 16 2016
5. String = Tuesday, Aug 16, 2016 12:10:56 PM
This example convert a String to java.time.LocalDateTime
package com.mkyong.java8.date; package com.mkyong.pageview; import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class TestNewDate5 { public static void main(String[] argv) { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("EEEE, MMM d, yyyy HH:mm:ss a"); String date = "Tuesday, Aug 16, 2016 12:10:56 PM"; LocalDateTime localDateTime = LocalDateTime.parse(date, formatter); System.out.println(localDateTime); System.out.println(formatter.format(localDateTime));
Output
2016-08-16T12:10:56 Tuesday, Aug 16, 2016 12:10:56 PM
6. String = 2016-08-16T15:23:01Z
The ‘Z’ suffix means UTC, you can convert into a java.time.instant directly, then display it with a time zone.
package com.mkyong.java8.date; import java.time.*; public class TestNewDate6 { public static void main(String[] argv) { String dateInString = "2016-08-16T15:23:01Z"; Instant instant = Instant.parse(dateInString); System.out.println("Instant : " + instant); //get date time only LocalDateTime result = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneOffset.UTC.getId())); //get localdate System.out.println("LocalDate : " + result.toLocalDate()); //get date time + timezone ZonedDateTime zonedDateTime = instant.atZone(ZoneId.of("Asia/Tokyo")); System.out.println(zonedDateTime); //get date time + timezone ZonedDateTime zonedDateTime2 = instant.atZone(ZoneId.of("Europe/Athens")); System.out.println(zonedDateTime2);
Output
Instant : 2016-08-16T15:23:01Z LocalDate : 2016-08-16 2016-08-17T00:23:01+09:00[Asia/Tokyo] 2016-08-16T18:23:01+03:00[Europe/Athens]
7. String = 2016-08-16T10:15:30+08:00
String -> ZonedDateTime -> LocalDate
package com.mkyong.java8.date; import java.time.*; import java.time.format.DateTimeFormatter; public class TestNewDate7 { public static void main(String[] argv) { String date = "2016-08-16T10:15:30+08:00"; ZonedDateTime result = ZonedDateTime.parse(date, DateTimeFormatter.ISO_DATE_TIME); System.out.println("ZonedDateTime : " + result); System.out.println("TimeZone : " + result.getZone()); LocalDate localDate = result.toLocalDate(); System.out.println("LocalDate : " + localDate);
Output
ZonedDateTime : 2016-08-16T10:15:30+08:00 TimeZone : +08:00 LocalDate : 2016-08-16
References
- DateTimeFormatter JavaDoc
- Classic SimpleDateFormat JavaDoc
- Java – How to convert String to Date
- Stackoverflow : simpledateformat parsing date with ‘Z’ literal
- Wikipedia : ISO 8601
- GMT VS UTC
- What is a Time Zone?