Created attachment 145655 [details]
Successfuly generated Entity and Controller Classes by NetBeans

NetBeans cannot generate a JPA controller class from the entity class by default methods. An error returns 'xxxx.xxxx.Users: could not find id property. Be sure the accessor method name matches the variable name'.
The database table 'USERS' for the Entity class, which is generated by NetBeans, has two fields in VARCHAR type, and one of them is primary key. The other Entity classes, which have id fields in INT property, let NetBeans generates controller classes successfully with default methods. I've attached two controller classes with their entity classes, one is for successfully generated (GeneralInfo.java ---> GeneralInfoJpaController.java), and the other one is that could not be generated (Users.java ---> UsersJpaController.java), and of course the table designs.