Java中的 Period withMonths() 方法和示例

Period 类的withMonths()方法用于获取具有指定月数的周期。这个月数作为整数值作为参数传递。

句法：

public Period withMonths(int numberOfMonths)

参数：此方法接受参数numberOfMonths ，该参数是此期间要更改的月数。

返回：此函数返回一个以作为参数传递的月数的Period 。

下面是 Period.withMonths() 方法的实现：

示例 1：

// Java code to demonstrate withMonths() method
  
import java.time.Period;
  
class GFG {
    public static void main(String[] args)
    {
  
        // Get the String to be withMonthsd
        String period = "P1Y2M21D";
  
        // Parse the String into Period
        Period p = Period.parse(period);
  
        System.out.println("Period: " + p);
  
        // Get the number of months
        int numberOfMonths = 5;
  
        // Change the numberOfMonths of this Period
        // using withMonths() method
        System.out.println("New Period: "
                           + p.withMonths(numberOfMonths));
    }
}

输出：

Period: P1Y2M21D
New Period: P1Y5M21D

示例 2：

// Java code to demonstrate withMonths() method
  
import java.time.Period;
  
class GFG {
    public static void main(String[] args)
    {
  
        // Get the String to be withMonthsd
        String period = "-P1Y2M21D";
  
        // Parse the String into Period
        Period p = Period.parse(period);
  
        System.out.println("Period: " + p);
  
        // Get the number of months
        int numberOfMonths = -5;
  
        // Change the numberOfMonths of this Period
        // using withMonths() method
        System.out.println("New Period: "
                           + p.withMonths(numberOfMonths));
    }
}

输出：

Period: P-1Y-2M-21D
New Period: P-1Y-5M-21D

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/Period.html#withMonths-int-