query() method of an YearMonth class used to query this YearMonth using the specified query as parameter.The TemporalQuery object passed as parameter define the logic to be used to obtain the result from this YearMonth.
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:
// Java program to demonstrate// YearMonth.query() method  import java.time.*;import java.time.temporal.*;  public class GFG {    public static void main(String[] args)    {          // create YearMonth object        YearMonth yM = YearMonth.of(2020, 12);          // apply query method of YearMonth class        String value = yM.query(TemporalQueries                                    .precision())                           .toString();          // print the result        System.out.println("Precision value"                           + " for YearMonth is "                           + value);    }} |
Output:
Precision value for YearMonth is Months
Program 2: Showing if query did not found the required object then it returns null.
// Java program to demonstrate// YearMonth.query() method  import java.time.*;import java.time.temporal.*;  public class GFG {    public static void main(String[] args)    {          // create YearMonth object        YearMonth YM = YearMonth.of(2019, 3);          // apply query method of YearMonth class        // print the result        System.out.println("Zone value for YearMonth is "                           + YM.query(                                 TemporalQueries.offset()));    }} |
Output:
Zone value for YearMonth is null
References: https://docs.oracle.com/javase/10/docs/api/java/time/YearMonth.html#query(java.time.temporal.TemporalQuery)
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