Java中的 MonthDay isValidYear() 方法及示例
MonthDay类的isValidYear()方法,用于检查指定年份对于本月日是否有效。这只能在 2 月 29 日返回 false。
句法:
public boolean isValidYear?(int year)
参数:此方法接受一个参数year ,即要验证的年份。
返回值:如果年份对本月日有效,则此方法返回布尔值 true。
下面的程序说明了 isValidYear() 方法:
方案一:
// Java program to demonstrate
// MonthDay.isValidYear() method
import java.time.*;
import java.time.temporal.ChronoField;
public class GFG {
public static void main(String[] args)
{
// create a MonthDay object
MonthDay month = MonthDay.parse("--10-12");
// apply isValidYear() method
boolean value = month.isValidYear(2012);
// print result
System.out.println("Year 2012 is valid for monthday: "
+ month + " = " + value);
}
}
输出:
Year 2012 is valid for monthday: --10-12 = true
方案二:
// Java program to demonstrate
// MonthDay.isValidYear() method
import java.time.*;
import java.time.temporal.ChronoField;
public class GFG {
public static void main(String[] args)
{
// create a MonthDay object
MonthDay month = MonthDay.parse("--02-29");
// apply isValidYear() method
boolean value = month.isValidYear(2017);
// print result
System.out.println("Year 2017 is valid for monthday: "
+ month + " = " + value);
}
}
输出:
Year 2017 is valid for monthday: --02-29 = false
参考资料: https: Java/time/MonthDay.html#isValidYear(int)