Java 8 – Unable to obtain LocalDateTime from TemporalAccessor

An example of converting a String to LocalDateTime, but it prompts the following errors:

Java8Example.java

package com.favtuts.time;

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

public class ParseDateWithoutTime {
    
    public static void main(String[] args) {
        parseDateFailed();
    }

    static void parseDateFailed() {
        String str = "31-Aug-2020";

        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd-MMM-yyyy", Locale.US);

        LocalDateTime localDateTime = LocalDateTime.parse(str, dtf);

        System.out.println(localDateTime);
    }
}

Output

Exception in thread "main" java.time.format.DateTimeParseException: Text '31-Aug-2020' could not be parsed: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 2020-08-31 of type java.time.format.Parsed
        at java.base/java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:2017)
        at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1952)
        at java.base/java.time.LocalDateTime.parse(LocalDateTime.java:492)
        at com.favtuts.time.ParseDateWithoutTime.parseDateFailed(ParseDateWithoutTime.java:18)
        at com.favtuts.time.ParseDateWithoutTime.main(ParseDateWithoutTime.java:10)
Caused by: java.time.DateTimeException: Unable to obtain LocalDateTime from TemporalAccessor: {},ISO resolved to 2020-08-31 of type java.time.format.Parsed
        at java.base/java.time.LocalDateTime.from(LocalDateTime.java:461)
        at java.base/java.time.format.Parsed.query(Parsed.java:235)
        at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1948)
        ... 3 more
Caused by: java.time.DateTimeException: Unable to obtain LocalTime from TemporalAccessor: {},ISO resolved to 2020-08-31 of type java.time.format.Parsed
        at java.base/java.time.LocalTime.from(LocalTime.java:431)
        at java.base/java.time.LocalDateTime.from(LocalDateTime.java:457)
        ... 5 more

Solution

The date 31-Aug-2020 contains no time, to fix it, uses LocalDate.parse(str, dtf).atStartOfDay()

package com.favtuts.time;

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

public class ParseDateWithoutTime {
    
    public static void main(String[] args) {
        parseDateSuccess();
    }

    static void parseDateSuccess() {
        String str = "31-Aug-2020";

        DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd-MMM-yyyy", Locale.US);
      
        LocalDateTime localDateTime = LocalDate.parse(str, dtf).atStartOfDay();

        System.out.println(localDateTime);
    }
}

Output

2020-08-31T00:00

Download Source Code

$ git clone https://github.com/favtuts/java-core-tutorials-examples

$ cd java-basic/time

References

• DateTimeFormatter JavaDoc
• LocalDateTime JavaDoc
• Java 8 – How to parse date with LocalDateTime
• Java 8 – How to convert String to LocalDate