JAVA EE: How to use query method of Instant class

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InstantDemo.java

import java.time.Instant;

import java.time.temporal.TemporalQueries;

import java.time.temporal.TemporalUnit;

public class InstantDemo

{

    public static void main(String[] args)

    {

        Instant instant = Instant.parse("2017-12-03T10:15:30.00Z");

        /*

         * Parameters:

         * 

         * query - the query to invoke, not null

         * 

         * Returns:

         * 

         * the query result, null may be returned (defined by the

         * query)

         */

        TemporalUnit temporalUnit = instant.query(TemporalQueries.precision());

        System.out.println(temporalUnit);

    }

}