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Persist error @ManyToMany how to define correct entities relationships

Serializable { @Id @GeneratedValue private long id; @ManyToMany(cascade=CascadeType ... Serializable { @Id //@GeneratedValue private long id ... javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.ManyToMany

General Performance Issues Illustrated with a Specific Method

.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence ... @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private static final long ... .persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratedValue; import

javax.persistence.TableGenerator

="/api/java/jpa/GeneratedValue" title="Annotation in javax.persistence">GeneratedValueGeneratedValue ... @GeneratedValue(strategy=TABLE, generator="addressGen") int id

javax.persistence.GenerationType

/jpa/GeneratedValue" title="Annotation in javax.persistence">GeneratedValue

javax.persistence.Id

>Column GeneratedValue" title="Annotation in javax.persistence">GeneratedValue

javax.persistence.SequenceGenerator

for the GeneratedValue" title="Annotation in javax.persistence">GeneratedValue

Step 2: Define a JPA Entity Class

.Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax ... serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id

Step 2: Define a JPA Entity Class

; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax ... serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id; private

Step 2: Define a JPA Entity Class

{ private static final long serialVersionUID = 1L; @Id @GeneratedValue private long

Step 2: Define a JPA Entity Class

; @Id @GeneratedValue private long id; private int x; private int y