65 | find(entityClass, primaryKey, lockMode, properties)Method javax.persistence.EntityManager T find( Class |
65 | find(entityClass, primaryKey, properties)Method javax.persistence.EntityManager T find( Class |
65 | find(entityClass, primaryKey, lockMode, properties)Methodjavax.persistence.EntityManager T find( Class |
65 | find(entityClass, primaryKey, lockMode)Method javax.persistence.EntityManager T find( Class |
65 | find(entityClass, primaryKey)Method javax.persistence.EntityManager T find( Class |
65 | find(entityClass, primaryKey, lockMode, properties)Method javax.persistence.EntityManager T find( Class |
44 | Retrieving JPA Entity Objects whose primary key is 1: Employee employee = em.find(Employee.class, 1); Casting of the retrieved object to Employee is not required because find is defined as returning an instance of the same class ... is returned. A similar method, getReference, can be considered the lazy version of find: Employee |
40 | Locking in JPA one atomic operation. For example, the find method has a form that accepts a lock mode: Employee employee = em.find( Employee.class, 1, LockModeType.PESSIMISTIC_WRITE); Similarly, the refresh ... ", 2000); Employee employee = em.find( Employee.class, 1, LockModeType.PESSIMISTIC_WRITE |
29 | CRUD Operations with JPAExplains how to use JPA for CRUD database operations (persist, retrieve, update, remove). |
24 | find() cost unreasonable time!, why? Result: =========== find time @ 24.125000 getSons time @ 0.000000 1 : type:Nodes, sons:2 child : 2 child : 3 Iterator time @ 0.000000 find time @ 0.000000 getSons time @ 0.000000 2 : type:Nodes, sons:2 child : 4 child : 5 Iterator time @ 0.000000 find time @ 0.000000 getSons |
