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Java YearMonth isSupported(TemporalUnit)用法及代码示例

YearMonth类的isSupported(TemporalUnit)方法用于检查YearMonth类是否支持指定的TemporalUnit。实际上,此方法检查是否可以在YearMonth中使用传递的单位对指定的单位应用加法或减法运算。如果为false,则调用plus(long,TemporalUnit)和minus方法将引发异常。

ChronoUnit(Temporalunit)支持的单位是:

  • MONTHS
  • YEARS
  • DECADES
  • CENTURIES
  • MILLENNIA
  • ERAS

所有其他ChronoUnit实例将返回false。


用法:

public boolean isSupported(TemporalUnit unit)

参数:此方法仅接受一个代表要检查的TemporalUnit的参数单元。

返回值:如果此YearMonth支持该单位,则此方法返回布尔值true,否则返回false。

以下示例程序旨在说明isSupported(TemporalUnit)方法:
程序1:

// Java program to demonstrate 
// YearMonth.isSupported(TemporalUnit) 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( 
                ChronoUnit.MONTHS); 
  
        // print result 
        System.out.println("MONTHS unit is supported by YearMonth class:"
                           + value); 
    } 
}
输出:
YearMonth:2017-08
MONTHS unit is supported by YearMonth class:true

程序2:

// Java program to demonstrate 
// YearMonth.isSupported(TemporalUnit) 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(2022, 12); 
  
        // print instance 
        System.out.println("YearMonth:"
                           + thisYearMonth); 
  
        // apply isSupported() method 
        boolean value 
            = thisYearMonth.isSupported( 
                ChronoUnit.MILLENNIA); 
  
        // print result 
        System.out.println("MILLENNIA unit is supported:"
                           + value); 
    } 
}
输出:
YearMonth:2022-12
MILLENNIA unit is supported:true

参考文献:
https://docs.oracle.com/javase/10/docs/api/java/time/YearMonth.html#isSupported(java.time.temporal.TemporalUnit)



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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 YearMonth isSupported(TemporalUnit) Method in Java with Examples。非经特殊声明,原始代码版权归原作者所有,本译文的传播和使用请遵循“署名-相同方式共享 4.0 国际 (CC BY-SA 4.0)”协议。