ChronoLocalDateTime query() method in Java with Examples

Last Updated : 28 May, 2019

query() method of an ChronoLocalDateTime interface is used to query this ChronoLocalDateTime using the specified query as parameter. The TemporalQuery object passed as parameter define the logic to be used to obtain the result from this ChronoLocalDateTime.

Syntax:

default <R> R query(TemporalQuery<R> query)

Parameters: This method accepts only one parameter query which is the query to invoke.

Return value: This method returns the query result, null may be returned.

Exception:This method throws following Exceptions:

DateTimeException – if unable to query .
ArithmeticException – if numeric overflow occurs.

Below programs illustrate the query() method:
Program 1:

// Java program to demonstrate 
// ChronoLocalDateTime.query() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime lt 
            = LocalDateTime.parse( 
                "2018-10-25T23:12:31.123"); 
  
        // apply query() method 
        // of ChronoLocalDateTime interface 
        String value 
            = lt.query( 
                    TemporalQueries.precision()) 
                  .toString(); 
  
        // print the result 
        System.out.println("Precision value"
                           + " for ChronoLocalDateTime is "
                           + value); 
    } 
} 

Output:

Precision value for ChronoLocalDateTime is Nanos

Program 2: Showing if query did not found the required object then it returns null.

// Java program to demonstrate 
// ChronoLocalDateTime.query() method 
  
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create ChronoLocalDateTime object 
        ChronoLocalDateTime lt 
            = LocalDateTime.parse( 
                "2018-10-25T23:12:31.123"); 
  
        // apply query() method 
        // of ChronoLocalDateTime interface 
        // and print the result 
        System.out.println("offset value "
                           + "for ChronoLocalDateTime is "
                           + lt.query(TemporalQueries.offset())); 
    } 
} 

Output:

offset value for ChronoLocalDateTime is null

References: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDateTime.html#query-java.time.temporal.TemporalQuery-

ChronoLocalDateTime range() method in Java with Examples

srinam

Improve

Article Tags :

Practice Tags :

Java

ChronoLocalDateTime query() method in Java with Examples

Similar Reads

Thank You!

What kind of Experience do you want to share?