If you are using Spring Boot + Spring Data or JPA and you get the below exception,
Exception Stack:
Caused by: org.hibernate.AnnotationException: No identifier specified for entity:
org.code2care.todolist.todolist.entities.ToDoEntity
at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:264)
~[hibernate-core-6.1.1.Final.jar:6.1.1.Final]
at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:209)
~[hibernate-core-6.1.1.Final.jar:6.1.1.Final]
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:676)
~[hibernate-core-6.1.1.Final.jar:6.1.1.Final]
Reason:
As you can read from the Stacktrace that it is an AnnotationException, so either you have missed adding @ID annotation to your entity or you have made use of the wrong @ID import.
Fix:
Replace: import org.springframework.data.annotation.Id; with import jakarta.persistence.Id;

Have Questions? Post them here!
- Create a Zip file using Java Code programmatically
- Eclipse : A java Runtime Environment (JRE) or Java Development kit (JDK) must be available
- How to Sort a LinkedList in Java
- Loading class com.mysql.jdbc.Driver. This is deprecated. The new driver class is com.mysql.cj.jdbc.Driver
- How to declare and initialize Array in Java Programming
- [Fix] java: integer number too large compilation error
- Java JDBC Connection with MySQL Driver in VS Code + Troubleshooting
- Reading .xls and .xlsx Excel file using Apache POI Java Library
- IntelliJ: Error: Could not find or load main class, java.lang.ClassNotFoundException
- How to get Client IP address using Java Code Example
- Truncate table using Java JDBC Example
- Struts 2 : There is no Action mapped for namespace [/] and action name [form] associated with context path [/proj]
- How to get file path in Idea IntelliJ IDE
- Java Generics explained with simple definition and examples
- Java SE 8 Update 301 available with various bug fixes and security improvements
- Java: Collect Stream as ArrayList or LinkedList
- Java JDBC Connection with PostgreSQL Driver Example
- How to check if Java main thread is alive
- How to fix Java nio NoSuchFileException wile reading a file
- Java 8+ get Day of the Week Examples with LocalDateTime, DateTime, ZonalDateTime and Instant classes
- Ways to Convert Integer or int to Long in Java
- [Java] How to throws Exception using Functional Interface and Lambda code
- [Fix] Spring Boot: mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
- Java: The value of the local variable string is not used
- Java JDBC: Insert Java 8 LocalDate and Time using PreparedStatement
- MacBook - Time Limit - You have reached your time limit, Ignore Limit - MacOS
- Loading previous page using html button using JavaScript - JavaScript
- W3 HTML validator warning Unable to Determine Parse Mode - Html
- PowerShell iterate and get all SharePoint sites and sub sites - SharePoint
- Java Streams with Filters Examples - Java
- Redirect page using jQuery - jQuery
- Connection Failed: 1130 PHP MySQL Error - MySQL
- Big Sur unsupported Mac [macOS] - MacOS