DateTimeFormatterBuilder
Description
We can create custom date time formatter from DateTimeFormatterBuilder.
Example
The following code builds a DateTimeFormatter
object to format a date in the format like "New Year in YEAR is on WEEK_DAY":
import java.time.LocalDate;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.TextStyle;
import java.time.temporal.ChronoField;
// w w w .jav a 2 s.c om
public class Main {
public static void main(String[] args) {
DateTimeFormatter formatter = new DateTimeFormatterBuilder()
.appendLiteral("New Year in ")
.appendValue(ChronoField.YEAR)
.appendLiteral(" is on ")
.appendText(ChronoField.DAY_OF_WEEK,TextStyle.FULL_STANDALONE)
.toFormatter();
LocalDate ld = LocalDate.of(2014, Month.JANUARY, 1);
String str = ld.format(formatter);
System.out.println(str);
}
}
The code above generates the following result.
Example 2
We can create the same custom formatter using a pattern from DateTimeFormatterBuilder.
import java.time.LocalDate;
import java.time.Month;
import java.time.format.DateTimeFormatter;
/*w w w. j a v a 2 s .c o m*/
public class Main {
public static void main(String[] args) {
LocalDate ld = LocalDate.of(2014,Month.JANUARY,1);
String pattern = "'New Year in' yyyy 'is on' EEEE";
DateTimeFormatter formatter = DateTimeFormatter.ofPattern(pattern);
String str = ld.format(formatter);
System.out.println(str);
}
}
The code above generates the following result.
