Steps to Implement

• Define Entity: We can define the entity of the JPA application.
• Retrieve the Entity: We need to obtain the reference to the entity that we wish to delete. This can be done using the JPA queries or EntityManager methods of the application.
• Mark for Deletion: Once the entity is retrieved it is marked for deletion using the EntityManager’s remove() method of the application
• Transaction Commit: We can ensure the deletion operation is included in the transaction and it can commit the transaction to persist the changes to the database of the application.
• Verify the Deletion: After committing the transaction we can verify that the entity has been successfully deleted from the database of the application.

Example:

// Step 1: Retrieve the entity
EntityManager entityManager = entityManagerFactory.createEntityManager();
EntityTransaction transaction = entityManager.getTransaction();
transaction.begin();

// Suppose we want to delete an entity of type Student with id = 1
Student student = entityManager.find(Student.class, 1);

// Step 2: Mark for Deletion
entityManager.remove(student);

// Step 3: Transaction Commit
transaction.commit();

// Step 4: Verify Deletion
Student deletedStudent = entityManager.find(Student.class, 1);
if(deletedStudent == null) {
    System.out.println("Entity successfully deleted!");
} else {
    System.out.println("Deletion failed!");
}

entityManager.close();

In Java, JPA can be defined as Java Persistence API, deleting the entity is the crucial operation in managing database records. It can involve removing an object from the database and ensuring the data consistency and integrity of the application.