LocalDate adjustInto() method in Java

The adjustInto() method of LocalDate class in Java is used to adjusts the specified temporal object to have the same date as this object.

Syntax:

public Temporal adjustInto(Temporal temporal)

Parameter: This method accepts a single parameter temporal which is the target object to be adjusted, and not specifically null.

Return Value: It returns the adjusted object, not null.

Exceptions: The function throws two exceptions as described below:

DateTimeException: the program throws this if it is unable to make the adjustment.
ArithmeticException: the program throws this if there is a numeric overflow.

Below programs illustrate the adjustInto() method of LocalDate in Java:

Program 1:

// Program to illustrate the adjustInto() method 
  
import java.util.*; 
import java.time.*; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
  
        ZonedDateTime date = ZonedDateTime.now(); 
  
        // prints the date 
        System.out.println(date); 
  
        // Parses the date 
        LocalDate date1 = LocalDate.parse("2015-01-31"); 
  
        // Uses the function to adjust the date 
        date = (ZonedDateTime)date1.adjustInto(date); 
  
        // Prints the adjusted date 
        System.out.println(date); 
    } 
} 

Output:

2018-11-28T05:36:08.205Z[Etc/UTC]
2015-01-31T05:36:08.205Z[Etc/UTC]

Program 2: To illustrate Exception. The below program throws an exception as February is of 28 days and not 31 days.

// Program to illustrate the adjustInto() method 
// Exception Program 
  
import java.util.*; 
import java.time.*; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
        try { 
            ZonedDateTime date = ZonedDateTime.now(); 
  
            // prints the date 
            System.out.println(date); 
  
            // Parses the date 
            LocalDate date1 = LocalDate.parse("2015-02-31"); 
  
            // Uses the function to adjust the date 
            date = (ZonedDateTime)date1.adjustInto(date); 
  
            // Prints the adjusted date 
            System.out.println(date); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
} 

Output:

2018-11-28T05:36:11.014Z[Etc/UTC]
java.time.format.DateTimeParseException: 
Text '2015-02-31' could not be parsed: Invalid date 'FEBRUARY 31'

Reference: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#adjustInto(java.time.temporal.Temporal)

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