ChronoLocalDateTime format() method in Java with Examples
The format() method of ChronoLocalDateTime interface in Java formats this date-time using the specified formatter.
Syntax:
default String format(DateTimeFormatter formatter)
Parameter: This method accepts a parameter formatter which specifies the DateTimeFormatter to use, not null.
Returns: The function returns the formatted date string and not null.
Below programs illustrate the ChronoLocalDateTime.format() method:
Program 1:
import java.util.*;
import java.time.*;
import java.time.chrono.*;
import java.time.format.DateTimeFormatter;
public class GfG {
public static void main(String[] args)
{
ChronoLocalDateTime dt1
= LocalDateTime
.parse( "2018-11-03T12:45:30" );
System.out.println( "Original ChronoLocalDateTime: "
+ dt1);
System.out.println( "BASIC_ISO_DATE format: "
+ (DateTimeFormatter.BASIC_ISO_DATE)
.format(dt1));
System.out.println( "ISO_LOCAL_DATE format: "
+ (DateTimeFormatter.ISO_LOCAL_DATE)
.format(dt1));
System.out.println( "ISO_DATE format: "
+ (DateTimeFormatter.ISO_DATE)
.format(dt1));
System.out.println( "ISO_LOCAL_TIME format: "
+ (DateTimeFormatter.ISO_LOCAL_TIME)
.format(dt1));
}
}
|
Output:
Original ChronoLocalDateTime: 2018-11-03T12:45:30
BASIC_ISO_DATE format: 20181103
ISO_LOCAL_DATE format: 2018-11-03
ISO_DATE format: 2018-11-03
ISO_LOCAL_TIME format: 12:45:30
Program 2:
import java.util.*;
import java.time.*;
import java.time.chrono.*;
import java.time.format.DateTimeFormatter;
public class GfG {
public static void main(String[] args)
{
ChronoLocalDateTime dt1
= LocalDateTime
.parse( "2016-09-06T12:45:30" );
System.out.println(dt1);
System.out.println( "ISO_TIME format: "
+ (DateTimeFormatter.ISO_TIME)
.format(dt1));
System.out.println( "ISO_LOCAL_DATE_TIME format: "
+ (DateTimeFormatter.ISO_LOCAL_DATE_TIME)
.format(dt1));
System.out.println( "ISO_DATE_TIME format: "
+ (DateTimeFormatter.ISO_DATE_TIME)
.format(dt1));
System.out.println( "ISO_ORDINAL_DATE format: "
+ (DateTimeFormatter.ISO_ORDINAL_DATE)
.format(dt1));
System.out.println( "ISO_WEEK_DATE format: "
+ (DateTimeFormatter.ISO_WEEK_DATE)
.format(dt1));
}
}
|
Output:
2016-09-06T12:45:30
ISO_TIME format: 12:45:30
ISO_LOCAL_DATE_TIME format: 2016-09-06T12:45:30
ISO_DATE_TIME format: 2016-09-06T12:45:30
ISO_ORDINAL_DATE format: 2016-250
ISO_WEEK_DATE format: 2016-W36-2
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#format-java.time.format.DateTimeFormatter-
Last Updated :
29 May, 2019
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