Java中的MonthDay isSupported()方法
可以使用isSupported()Java中MonthDay类中的方法来检查MonthDay类是否支持ChronoField。此方法需要单个参数，即ChronoField进行检查。如果MonthDay类支持ChronoField，则返回true，否则返回false。
演示此程序如下
示例
import java.time.*;
import java.time.temporal.*;
public class Demo {
public static void main(String[] args) {
MonthDay md = MonthDay.now();
System.out.println("The MonthDay is: " + md);
boolean flag = md.isSupported(ChronoField.MONTH_OF_YEAR);
if(flag)
System.out.println("The ChronoField MONTH_OF_YEAR is supported");
else
System.out.println("The ChronoField MONTH_OF_YEAR is not supported");
}
}输出
The MonthDay is: --02-21 The ChronoField MONTH_OF_YEAR is supported
现在让我们了解上面的程序。
首先，显示当前的MonthDay对象。然后，该isSupported()方法用于检查MonthDay类是否支持ChronoFieldMONTH_OF_YEAR。返回的值存储在标志中，并打印相应的响应。演示此代码段如下所示：
MonthDay md = MonthDay.now();
System.out.println("The MonthDay is: " + md);
boolean flag = md.isSupported(ChronoField.MONTH_OF_YEAR);
if(flag)
System.out.println("The ChronoField MONTH_OF_YEAR is supported");
else
System.out.println("The ChronoField MONTH_OF_YEAR is not supported");