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));    }} |
Output:
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));    }} |
Output:
2018-11-03T12:45:30 2019-12-04T12:45:30 true
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