Java中的LocalDateTime isSupported()方法
可以使用isSupported()Java的LocalDateTime类中的方法来检查LocalDateTime类是否支持ChronoUnit。此方法需要单个参数,即ChronoUnit进行检查。如果LocalDateTime类支持ChronoUnit,则返回true,否则返回false。
演示此的程序如下所示-
示例
import java.time.*;
import java.time.temporal.*;
public class Demo {
public static void main(String[] args) {
LocalDateTime ldt = LocalDateTime.now();
System.out.println("The LocalDateTime is: " + ldt);
boolean flag = ldt.isSupported(ChronoUnit.HOURS);
if(flag)
System.out.println("The ChronoUnit HOURS is supported");
else
System.out.println("The ChronoUnit HOURS is not supported");
}
}输出结果
The LocalDateTime is: 2019-02-18T07:12:12.472 The ChronoUnit HOURS is supported
现在让我们了解上面的程序。
首先显示当前时刻。然后,该isSupported()方法用于检查ChronoUnitHOURS是否受LocalDateTime类支持。返回的值存储在标志中,并打印相应的响应。演示这的代码片段如下-
LocalDateTime ldt = LocalDateTime.now();
System.out.println("The LocalDateTime is: " + ldt);
boolean flag = ldt.isSupported(ChronoUnit.HOURS);
if(flag)
System.out.println("The ChronoUnit HOURS is supported");
else
System.out.println("The ChronoUnit HOURS is not supported");