[Solved] Unable to obtain LocalDateTime from TemporalAccessor

In this post, I will be sharing how to fix the Unable to obtain LocalDateTime from TemporalAccessor error in Java. This error message is unclear and unhelpful. Do not worry we will be sharing two solutions for this error with you.

Read Also: [Solved] unchecked or unsafe operations. Recompile with -Xlint:unchecked for details.

Let's dive deep into the topic:

[Fixed] Unable to Obtain LocalDateTime from TemporalAccessor

As always, first, we will produce the unable to obtain LocalDateTime from TemporalAccessor error before moving on to the solution.

1. Producing the error by converting String to LocalDateTime

We can easily produce the error by converting String to LocalDateTime and the formatted string does not have time-related information as shown below in the example:

import java.time.format.DateTimeFormatter;
import java.time.LocalDateTime;

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

      // Custom formatted date String     
      String date = "2022/10/25";

      // Creating DateTimeFormatter object with Specified format
      DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");

      // Converting String to LocalDateTime 
      LocalDateTime ldt = LocalDateTime.parse(date, dtf);
      // Print LocalDateTime instance
      System.out.println("LocalDateTime object is: " + ldt);
    }
}

Output:
Exception in thread "main" java.time.format.DateTimeParseException: Text '2022/10/25' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 2022-10-25 of type java.time.format.Parsed

Explanation:

The formatted string does not contain time-related information. It contains only the Date information. To get rid of this error we need to call atStartOfDay() method after parsing the string. atStartOfDay() method will return the LocalDateTime object that will contain the time-related information too. In simple words, it will give you the LocalDateTime object at the specified date having the hour, minute, and second fields set to 0.

Solution:

As discussed above, we need to call the atStartOfDay() method on the parsed string as shown below in the example:

import java.time.format.DateTimeFormatter;
import java.time.LocalDateTime;
import java.time.LocalDate;

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

      // Given Custom formatted date String     
      String date = "2022/10/25";

      // Producing DateTimeFormatter object with Specified format
      DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");

      // Converting String to LocalDateTime object
      LocalDateTime ldt = LocalDate.parse(date, dtf).atStartOfDay();
      // Display LocalDateTime instance
      System.out.println("LocalDateTime object is: " + ldt);
    }
}

Output:
LocalDateTime object is: 2022-10-25T00:00

Solution 2: Using LocalDate instead of LocalDateTime

As we already knew, a formatted string does not contain time information, we may use LocalDate instead of LocalDateTime as shown below in the example:

import java.time.format.DateTimeFormatter;
import java.time.LocalDate;

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

      // Given Custom formatted date string     
      String date = "2022/10/25";

      // Creating DateTimeFormatter object with specified format
      DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");

      // Converting String to LocalDate object
      LocalDate ld = LocalDate.parse(date, dtf);
      // Print LocalDate instance
      System.out.println("LocalDate object is: " + ld);
    }
}

Output:
LocalDate object is: 2022-10-25

That's all for today. Please mention in the comments if you have any questions related to how to solve unable to obtain LocalDateTime from TemporalAccessor in Java.