The isBefore() method of ChronoLocalDateTime interface in Java is used to check if the date, passed as the parameter, is before this ChronoLocalDateTime instance or not. It returns a boolean value showing the same.
Syntax:
default boolean isBefore(ChronoLocalDateTime otherDate)
Parameter: This method accepts a parameter otherDate which specifies the other date-time to be compared to this ChronoLocalDateTime. It should not be null.
Returns: The function returns boolean value showing if this date-time is before the specified date-time.
Below programs illustrate the ChronoLocalDateTime.isBefore() method:
Program 1:
// Program to illustrate the isBefore() method import java.util.*;
import java.time.*;
import java.time.chrono.*;
public class GfG {
public static void main(String[] args)
{
// Parses the date
ChronoLocalDateTime dt1
= LocalDateTime.parse( "2018-11-03T12:45:30" );
// Prints the date
System.out.println(dt1);
// Parses the date
ChronoLocalDateTime dt2
= LocalDateTime.parse( "2016-12-04T12:45:30" );
// Prints the date
System.out.println(dt2);
// Compares both dates
System.out.println(dt1.isBefore(dt2));
}
} |
2018-11-03T12:45:30 2016-12-04T12:45:30 false
Program 2:
// Program to illustrate the isBefore() method import java.util.*;
import java.time.*;
import java.time.chrono.*;
public class GfG {
public static void main(String[] args)
{
// Parses the date
ChronoLocalDateTime dt1
= LocalDateTime.parse( "2018-11-03T12:45:30" );
// Prints the date
System.out.println(dt1);
// Parses the date
ChronoLocalDateTime dt2
= LocalDateTime.parse( "2019-12-04T12:45:30" );
// Prints the date
System.out.println(dt2);
// Compares both dates
System.out.println(dt1.isBefore(dt2));
}
} |
2018-11-03T12:45:30 2019-12-04T12:45:30 true