public boolean isSupported(TemporalField field)

// Java program to demonstrate
// YearMonth.isSupported(TemporalField) method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // Create a YearMonth object
        YearMonth thisYearMonth = YearMonth.of(2017, 8);
  
        // print instance
        System.out.println("YearMonth :"
                           + thisYearMonth);
  
        // apply isSupported() method
        boolean value
            = thisYearMonth.isSupported(
                ChronoField.PROLEPTIC_MONTH);
  
        // print result
        System.out.println("PROLEPTIC_MONTH Field is supported by YearMonth class: "
                           + value);
    }
}

YearMonth :2017-08
PROLEPTIC_MONTH Field is supported by YearMonth class: true

// Java program to demonstrate
// YearMonth.isSupported(TemporalField) method
  
import java.time.*;
import java.time.temporal.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // Create a YearMonth object
        YearMonth thisYearMonth = YearMonth.of(2017, 8);
  
        // print instance
        System.out.println("YearMonth :"
                           + thisYearMonth);
  
        // apply isSupported() method
        boolean value
            = thisYearMonth.isSupported(
                ChronoField.HOUR_OF_DAY);
  
        // print result
        System.out.println("HOUR_OF_DAY Field is supported by YearMonth class: "
                           + value);
    }
}

YearMonth :2017-08
HOUR_OF_DAY Field is supported by YearMonth class: false