YearMonth until() Method in Java with Examples

until() method of the YearMonth class used to calculate the amount of time between two YearMonth objects using TemporalUnit. The start and end points are this and the specified YearMonth passed as a parameter. The result will be negative if the end is before the start. The calculation returns a whole number, representing the number of complete units between the two YearMonth. This instance is immutable and unaffected by this method call.

Syntax:

public long until(Temporal endExclusive, TemporalUnit unit)

Parameters: This method accepts two parameters endExclusive which is the end date, exclusive, which is converted to a YearMonth and unit which is the unit to measure the amount.

Return value: This method returns the amount of time between this YearMonth and the end YearMonth.

Exception:This method throws following Exceptions:

DateTimeException – if the amount cannot be calculated, or the ending temporal cannot be converted to a YearMonth.
UnsupportedTemporalTypeException – if the unit is not supported.
ArithmeticException – if numeric overflow occurs.

Below programs illustrate the until() method:
Program 1:

// Java program to demonstrate 
// YearMonth.until() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        // create YearMonth objects 
        YearMonth y1 = YearMonth.of(2018, 12); 
        YearMonth y2 = YearMonth.of(2015, 10); 
  
        // apply until the method of YearMonth class 
        long result 
            = y2.until(y1, 
                       ChronoUnit.YEARS); 
  
        // print results 
        System.out.println("Result in YEARS: "
                           + result); 
    } 
} 

Output:

Result in YEARS: 3

Program 2:

// Java program to demonstrate 
// YearMonth.until() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        // create YearMonth objects 
        YearMonth y1 = YearMonth.of(2018, 12); 
        YearMonth y2 = YearMonth.of(2015, 10); 
  
        // apply until the method of YearMonth class 
        long result 
            = y1.until(y2, 
                       ChronoUnit.MONTHS); 
  
        // print results 
        System.out.println("Result in MONTHS: "
                           + result); 
    } 
} 