About long

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Tutorial
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Step 2: Entity Class and Persistence Unit

.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id
Tutorial
11

Step 2: Entity Class and Persistence Unit

static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private String name; private Date signingDate; // Constructors: public
Manual
11

JPA Entity Fields

static type, including a generic java.lang.Object, as long as the type of the actual value at runtime ... should have a numeric type: @Entity public class EntityWithVersionField { @Version long version
Manual
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SSL Configuration

connections from any machine as long as a valid username and password are provided. If an authentication
Manual
8

Database Management Settings

is very useful for recurring queries with identical arguments. As long as the relevant data in
Tutorial
8

Step 4: Add a Servlet Class

"}) public class GuestServlet extends HttpServlet { private static final long serialVersionUID = 1L
Manual
8

FROM clause (JPQL / Criteria API)

a simpler long path expression (which is not an option for a collection). For example: SELECT c, c
Tutorial
8

Step 4: Add a Servlet Class

.persistence.*; public class GuestServlet extends HttpServlet { private static final long
Manual
8

Retrieving JPA Entity Objects

fetch policy, as long as the EntityManager is open. This also includes fields that reference entity
Manual
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Literals in JPQL and Criteria Queries

. Following are examples of valid numeric literals in JPQL: int: 2010, -127, 0, 07777 long: 2010L, -127L