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Following example show the usage @Temporal annotation. The @Temporal is used to specify the type that a JPA extension must persist for entity fields of type java.util.Date and java.util.Calendar only .

As you can see , in our entity i use it for java.util.Date .

Code:

package com
.codemiles.jpa;
import java.util.Collection;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;



@
Entity
@Table(name="TOPIC")
public class 
Topic implements java.io.Serializable{
    
/**
     * 
     */
    
private static final long serialVersionUID 1L;
    @
Id
    
private int Id;
    private 
String title;
    private 
Date creationDate;
    private 
Date modifedDate;
    private 
String content;
    @
OneToMany(mappedBy="topic")
    private 
Collection<Commentcomments;

    public 
int getId() {
        return 
Id;
    }
    public 
void setId(int id) {
        
Id id;
    }
    
    @
Column(name="TITLE")
    public 
String getTitle() {
        return 
title;
    }
    public 
void setTitle(String title) {
        
this.title title;
    }
    @
Temporal(TemporalType.DATE)
    @
Column(name="CREATION_DATE")
    public 
Date getCreationDate() {
        return 
creationDate;
    }
    public 
void setCreationDate(Date creationDate) {
        
this.creationDate creationDate;
    }
    @
Temporal(TemporalType.DATE)
    @
Column(name="MODIFED_DATE")
    public 
Date getModifedDate() {
        return 
modifedDate;
    }
    public 
void setModifedDate(Date modifedDate) {
        
this.modifedDate modifedDate;
    }
    
    @
Column(name="CONTENT")
    public 
String getContent() {
        return 
content;
    }
    public 
void setContent(String content) {
        
this.content content;
    }
    public 
void setComments(Collection<Commentcomments) {
    
this.comments comments;
    }
    public 
Collection<CommentgetComments() {
    return 
comments;
    }
}
 




_________________
M. S. Rakha, Ph.D.
Queen's University
Canada


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