LocalDate with() Method in Java with Examples

In LocalDate class, there are two types of with() method depending upon the parameters passed to it.

with(TemporalAdjuster adjuster)

with(TemporalAdjuster adjuster) method of the LocalDate class used to adjusted this date-time using TemporalAdjuster passed as parameter and after adjustment returns the copy of adjusted date-time.The adjustment takes place using the specified adjuster strategy object. This instance of LocalDate is immutable and unaffected by this method call.

Syntax:

public LocalDate with(TemporalAdjuster adjuster)

Parameters: This method accepts adjuster as parameter which is the adjuster to use.

Return value: This method returns a LocalDate based on this with the adjustment made.

Exception: This method throws following Exceptions:

• DateTimeException – if the adjustment cannot be made.
• ArithmeticException – if numeric overflow occurs.

Below programs illustrate the with() method:

Program 1:

// Java program to demonstrate
// LocalDate.with() method

import java.time.*;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate local
            = LocalDate.parse(
                "2018-12-06");

        // print instance
        System.out.println("LocalDate before"
                           + " adjustment: "
                           + local);

        // apply with method of LocalDate class
        LocalDate updatedlocal
            = local.with(Month.MARCH)
                  .with(TemporalAdjusters
                            .lastDayOfMonth());

        // print instance
        System.out.println("LocalDate after"
                           + " adjustment: "
                           + updatedlocal);
    }
}

Output:

LocalDate before adjustment: 2018-12-06
LocalDate after adjustment: 2018-03-31

with(TemporalField field, long newValue)

with(TemporalField field, long newValue) method of the LocalDate class used to set the specified field of LocalDate to a new value and returns the copy of new date-time.This method can be used to change any supported field, such as the year, month or day-of-month. An exception is thrown If setting the new value is not possible due to the field is not supported or for some other reason.
In some cases, changing the specified field can cause the resulting date-time to become invalid, such as changing the month from 31st January to February would make the day-of-month invalid. In cases like this, the field is responsible for resolving the date. Typically it will choose the previous valid date, which would be the last valid day of February in this example. This instance of LocalDate is immutable and unaffected by this method call.

Syntax:

public LocalDate with(TemporalField field, long newValue)

Parameters: This method accepts field which is the field to set in the result and newValue which the new value of the field in the result as parameters.

Return value: This method returns a LocalDate based on this with the specified field set.

Exception: This method throws following Exceptions:

• DateTimeException – if the adjustment cannot be made.
• UnsupportedTemporalTypeException – if the field is not supported.
• ArithmeticException – if numeric overflow occurs.

Below programs illustrate the with() method:

Program 1:

// Java program to demonstrate
// LocalDate.with() method

import java.time.*;
import java.time.temporal.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a LocalDate object
        LocalDate local
            = LocalDate.parse(
                "2018-12-06");

        // print instance
        System.out.println("LocalDate before"
                           + " applying method: "
                           + local);

        // apply with method of LocalDate class
        LocalDate updatedlocal
            = local.with(
                ChronoField.DAY_OF_MONTH, 30);

        // print instance
        System.out.println("LocalDate after"
                           + " applying method: "
                           + updatedlocal);
    }
}

Output:

LocalDate before applying method: 2018-12-06
LocalDate after applying method: 2018-12-30

References:
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#with(java.time.temporal.TemporalField, long)
https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#with(java.time.temporal.TemporalAdjuster)