ChronoLocalDate query() Method in Java with Examples
query() method of an ChronoLocalDate interface used to query this ChronoLocalDate using the specified query as parameter. The TemporalQuery object passed as parameter define the logic to be used to obtain the result from this ChronoLocalDate.
Syntax:
public <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:
import java.time.*;
import java.time.temporal.*;
import java.time.chrono.*;
public class GFG {
public static void main(String[] args)
{
ChronoLocalDate ld = LocalDate.parse( "2018-12-31" );
String value
= ld.query(TemporalQueries.precision())
.toString();
System.out.println( "Precision value for ChronoLocalDate is "
+ value);
}
}
|
Output:
Precision value for ChronoLocalDate is Days
Program 2: Showing if query did not found the required object then it returns null.
import java.time.*;
import java.time.temporal.*;
import java.time.chrono.*;
public class GFG {
public static void main(String[] args)
{
ChronoLocalDate ld = LocalDate.parse( "2018-12-31" );
System.out.println( "Zone value for ChronoLocalDate is "
+ ld.query(
TemporalQueries.offset()));
}
}
|
Output:
Zone value for ChronoLocalDate is null
References:
https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoLocalDate.html#query-java.time.temporal.TemporalQuery-
Last Updated :
29 Apr, 2019
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