年月发布支持的 Java(临时字段)方法,示例
原文:https://www . geesforgeks . org/year month-issupportedtemporalfield-method-in-Java-with-examples/
YearMonth 类的isSupported(temporal field)方法用于检查 YearMonth 类是否支持指定的字段,这意味着使用该方法我们可以检查指定字段是否可以查询到 YearMonth 对象。
计时场支持的字段有:
- 年月日
- prolective _ MONTH
- 纪元年
- 年
- 时代
所有其他时间域实例都将返回 false。
语法:
public boolean isSupported(TemporalField field)
参数:此方法只接受一个参数字段,代表要检查的字段。
返回值:如果此年月支持该字段,则该方法返回布尔值 true,否则返回 false。
以下程序说明了问题支持(临时字段)方法:
程序 1:
// 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);
}
}
Output:
YearMonth :2017-08
PROLEPTIC_MONTH Field is supported by YearMonth class: true
程序 2:
// 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);
}
}
Output:
YearMonth :2017-08
HOUR_OF_DAY Field is supported by YearMonth class: false
版权属于:月萌API www.moonapi.com,转载请注明出处