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ChronoLocalDateTime isBefore() method in Java with Examples

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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
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#isBefore-java.time.chrono.ChronoLocalDateTime-

Last Updated : 29 May, 2019
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