How To Add Days into a Date from java.util.Date class

I have a problem when i wants to add 2 or days into a
date object geting by java.util.Date class. so please help me resolve this issue?
for e.g i have a date object having 30/06/2001,
by adding 2 days i want 02/07/2001 date object ?
Code
public class test2
public static void main(String args[])
java.util.Date postDate = new java.util.Date();
myNewDate = postDate /* ?*/;
Here i want to add 2 date into postDate

Use Calendar...
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
cal.add(Calendar.DAY, 2); // I'm not sure about that "DAY"

Similar Messages

How to change a date value from "java.util.Date" to "java.sql.Date"?

Hi all,
How to change a date value from "java.util.Date" to "java.sql.Date"?
I m still confusing what's the difference between them.....
thanks
Regards,
Kin

Thanks
but my sql statement can only accept the format (yyyy-MM-dd)
such as "select * from xx where somedate = '2004-12-31'
but when i show it to screen, i want to show it as dd-MM-yyyy
I m using the following to change the jave.util.Date to str and vice versa. But it cannot shows the dd-MM-yyyy. I tried to change the format from yyyy-MM-dd to dd-MM-yyyy, it shows the wrong date in my application.
     public String date2str(java.util.Date thisdate)     {
          if (thisdate != null)     {
               java.sql.Date thissDate = new java.sql.Date(thisdate.getTime());
               return date2str(thissDate);
          }     else     {
               return "";
     public String date2str(java.sql.Date thisdate)     {
          if (thisdate != null)     {
               SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
               return sdf.format(thisdate);
          }     else     {
               return "";
     public java.util.Date str2date(String thisdate)     {
          String dateFormat = "yyyy-MM-dd"; // = 1998-12-31
          java.util.Date returndate = null;
          if (thisdate != null)     {
               SimpleDateFormat dateFormatter = new SimpleDateFormat(dateFormat);
               try {
                    returndate = dateFormatter.parse(thisdate);
               } catch (ParseException pe) {
                    System.out.println (pe.getMessage());
          return returndate;
     }

Cannot convert from java.util.Date to java.sql.Date

In the below code am trying to get the current date and 60 days prior date:
Date todayDate;
          Date Sixtydaysprior;
          String DATE_FORMAT = "MM/dd/yy";
          DateFormat sdf = new SimpleDateFormat(DATE_FORMAT);
         Calendar cal = Calendar.getInstance();
          todayDate = sdf.parse(sdf.format(cal.getTime()));
          cal.add(Calendar.DATE, -60);
         Sixtydaysprior = sdf.parse(sdf.format(cal.getTime()));I have imported following files:
<%@page
     import="java.util.Calendar,
               java.text.SimpleDateFormat,
               java.text.ParseException,
                        java.util.*"
%>Shows up following error msg:
Type mismatch: cannot convert from java.util.Date to java.sql.Date
Thanks.
Edited by: MiltonDetroja on May 22, 2009 11:03 AM

Shows up following error msg:
Type mismatch: cannot convert from java.util.Date to java.sql.Date
I don't think this exception is thrown from the portion of code you have shown. As clearly specified in exception message, you cannot cast an instance of java.util.Date to java.sql.Date. you will need to do something like this
java.util.Date today = new java.util.Date();
long t = today.getTime();
java.sql.Date dt = new java.sql.Date(t);

How to identify which is current week by java.util.Date

below code wriiten to identify number of weeks in a given month,
i need current week in a from below code.Can any one help me?
for(int i=1;i<32;i++){
Date d = new Date(2005,11,i);
intMonDtTemp=d.getMonth();
0-sunday
1-monday
5-friday
6-saturaday
// number of weeks is based on monday's in given month
//System.out.println(intMonDtTemp+" at =month dt "+ intMonDt);
if(intMonDtTemp==intMonDt){
     //System.out.println(i+" = "+ d);
     //System.out.println("MONTHS EQUAL");
     if(d.getDay()==1){
          count= count+1;
}//end of for
if(count==5){
     System.out.println(strDt+" = 5 weeks");
} else {
     System.out.println(strDt+" = 4 weeks");
}//end of else

using Calendar, not Date
import java.util.Calendar;
class Testing
public Testing()
    Calendar cal = Calendar.getInstance();
    int month = Calendar.OCTOBER;// months are 0-based 0-11, not 1-12
    cal.set(2005,month,1);
    int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
    if(dayOfWeek > 2) dayOfWeek -= 7;
    cal.add(Calendar.DATE,2 - dayOfWeek);
    int mondaysInMonth = 0;
    while(cal.get(Calendar.MONTH) == month)
      cal.add(Calendar.DATE,7);
      mondaysInMonth++;
    System.out.println("Mondays in month = "+mondaysInMonth);
public static void main(String[] args){new Testing();}
}

Wsimport, mapping of xs:date to java.util.Date via ext file, and -B option

Summary:
JDK 1.7.0_09 and wsimport and xjc that comes with it.
Global JAXB binding to map xs:date to java.util.Date
I have the following external bindings file:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
     xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
     elementFormDefault="qualified" attributeFormDefault="unqualified"
     jaxb:extensionBindingPrefixes="xjc" jaxb:version="2.1">
     <xs:annotation>
          <xs:appinfo>
               <jaxb:globalBindings>
                    <xjc:serializable />
                    <jaxb:javaType name="java.util.Date" xmlType="xs:date" parseMethod="au.com.xxx.jaxb.DateAdapter.parseDate" printMethod="au.com.xxx.jaxb.DateAdapter.printDate" />
               </jaxb:globalBindings>
          </xs:appinfo>
     </xs:annotation>
</xs:schema>The au.com.xxx.jaxb.DateAdapter code is as follows:
package au.com.xxx.jaxb;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.bind.DatatypeConverter;
public class DateAdapter {
     public static Date parseDate(String s) {
          return DatatypeConverter.parseDate(s).getTime();
     public static String printDate(Date dt) {
          Calendar cal = new GregorianCalendar();
          cal.setTime(dt);
          return DatatypeConverter.printDate(cal);
}When I run the following wsimport from the command line, I get:
salvojo@AUD20901BL /cygdrive/c/workspace/JSF/insurance
$ /cygdrive/c/java/jdk1.7.0_09/x64/bin/wsimport -keep -s gen-src -b external/wsdl/jaxb-bindings.xml -wsdllocation /wsdl/Member.wsdl -d WebContent/WEB-INF/classes external/wsdl/Member.wsdl
parsing WSDL...
Generating code...
Compiling code...
C:\workspace\JSF\insurance\gen-src\org\w3\_2001\xmlschema\Adapter1.java:13: error: package au.com.xxx.jaxb does not exist
        return (au.com.xxx.jaxb.DateAdapter.parseDate(value));
                               ^
C:\workspace\JSF\insurance\gen-src\org\w3\_2001\xmlschema\Adapter1.java:17: error: package au.com.xxx.jaxb does not exist
        return (au.com.xxx.jaxb.DateAdapter.printDate(value));
                               ^
2 errors
compilation failed, errors should have been reportedWhich means that wsimport or xjc needs to know the classpath to find au.com.xxx.jaxb.DateAdapter.
But how do I pass the classpath from wsimport to the JAXB compiler ?
There is the -B option in wsimport, but I could not get it to work.
If I read it correctly, I should be able to pass the -classpath option to the JAXB compiler from wsimport via -B.
I tried:
salvojo@AUD20901BL /cygdrive/c/workspace/JSF/insurance
$ /cygdrive/c/java/jdk1.7.0_09/x64/bin/wsimport -keep -s gen-src -B"-classpath WebContent/WEB-INF/classes" -b external/wsdl/jaxb-bindings.xml -wsdllocation /wsdl/Member.wsdl -d WebContent/WEB-INF/classes external/wsdl/Member.wsdl
no such JAXB option: -classpath WebContent/WEB-INF/classes
Usage: wsimport [options] <WSDL_URI>
where [options] include:
-b <path>                 specify jaxws/jaxb binding files or additional schemas
                            (Each <path> must have its own -b)
-B<jaxbOption>            Pass this option to JAXB schema compiler
-catalog <file>           specify catalog file to resolve external entity references
                            supports TR9401, XCatalog, and OASIS XML Catalog format.
-d <directory>            specify where to place generated output files
<...snipped...>... where WebContent/WEB-INF/classes is the classpath where au.com.xxx.jaxb.DateAdapter.class could be found. Obviously it did not like it.
Also, why is wsimport generate org.w3._2001.xmlschema.Adapter1.java ? All it is doing is wrapping up the exact same call that I have specified in my DateAdapter. How can I tell wsimport or xjc to NOT create that extra Adapter1.java and simply directly use my DateAdapter ??

create additional column of type LONG to represent date.
dateFormat is of type java.util.Date:
long newLongDate = dateFormat.getTime();
select object(b) from MyEntity b where b.MYLONGDATE > ?1 and b.MYLOGDATE <= ?2

Cannot find symbl method update Date(int,java.util.Date)

I get following error
cannot find symbl method update Date(int,java.util.Date) on compling class called GuestDataBean at line ( rowSet.updateDate( 4, guest.getDate() ); ).
GustBean.java. I need help on why I get it.
// JavaBean to store data for a guest in the guest book.
package com.deitel.jhtp6.jsp.beans;
import java.util.*;
public class GuestBean
   private String firstName;
   private String lastName;
   private String email;
   private Date date;
   private String message;
   //Constructors
   public GuestBean(){
        public GuestBean(String firstname, String lastname, String email,Date date,String message){
             this.firstName=firstname;
             this.lastName=lastName;
             this.email=email;
             this.date=date;
             this.message=message;
   // set the guest's first name
   public void setFirstName( String name )
      firstName = name;
   } // end method setFirstName
   // get the guest's first name
   public String getFirstName()
      return firstName;
   } // end method getFirstName
   // set the guest's last name
   public void setLastName( String name )
      lastName = name;
   } // end method setLastName
   // get the guest's last name
   public String getLastName()
      return lastName;
   } // end method getLastName
   // set the guest's email address
   public void setEmail( String address )
      email = address;
   } // end method setEmail
   // get the guest's email address
   public String getEmail()
      return email;
   } // end method getEmail
   public void setMessage( String mess)
      message = mess;
   } // end method setEmail
   // get the guest's email address
   public String getMessage()
      return message;
   } // end method getEmail
   public void setDate( Date dat )
      date = dat;
   } // end method setEmail
   // get the guest's email address
   public Date getDate()
      return date;
   } // end method getEmail
} // end class GuestBean
GuestDataBean.java/**
* @(#)GuestDataBean.java
* @author
* @version 1.00 2008/7/18
// Class GuestDataBean makes a database connection and supports
// inserting and retrieving data from the database.
package com.deitel.jhtp6.jsp.beans;
import java.sql.SQLException;
import javax.sql.rowset.CachedRowSet;
import java.util.ArrayList;
import com.sun.rowset.CachedRowSetImpl; // CachedRowSet implementation
import java.sql.*;
public class GuestDataBean
   private CachedRowSet rowSet;
   // construct TitlesBean object
   public GuestDataBean() throws Exception
      // load the MySQL driver
      Class.forName( "org.gjt.mm.mysql.Driver" );
      // specify properties of CachedRowSet
      rowSet = new CachedRowSetImpl();
      rowSet.setUrl( "jdbc:mysql://localhost:3306/virsarmedia" );
      rowSet.setUsername( "root" );
      rowSet.setPassword( "" );
       // obtain list of titles
      rowSet.setCommand(
         "SELECT firstName, lastName, email,date,message FROM guest" );
      rowSet.execute();
   } // end GuestDataBean constructor
   // return an ArrayList of GuestBeans
   public ArrayList< GuestBean > getGuestList() throws SQLException
      ArrayList< GuestBean > guestList = new ArrayList< GuestBean >();
      rowSet.beforeFirst(); // move cursor before the first row
      // get row data
      while ( rowSet.next() )
         GuestBean guest = new GuestBean();
         guest.setFirstName( rowSet.getString( 1 ) );
         guest.setLastName( rowSet.getString( 2 ) );
         guest.setEmail( rowSet.getString( 3 ) );
         guest.setDate( rowSet.getDate( 4 ) );
         guest.setMessage( rowSet.getString( 5 ) );
         guestList.add( guest );
      } // end while
      return guestList;
   } // end method getGuestList
   // insert a guest in guestbook database
   public void addGuest( GuestBean guest ) throws SQLException
      rowSet.moveToInsertRow(); // move cursor to the insert row
      // update the three columns of the insert row
      rowSet.updateString( 1, guest.getFirstName() );
      rowSet.updateString( 2, guest.getLastName() );
      rowSet.updateString( 3, guest.getEmail() );
      rowSet.updateDate( 4, guest.getDate() );
      rowSet.updateString( 5, guest.getMessage() );
      rowSet.insertRow(); // insert row to rowSet
      rowSet.moveToCurrentRow(); // move cursor to the current row
      rowSet.commit(); // propagate changes to database
   } // end method addGuest
} // end class GuestDataBean

This isn't a JSP question, it better belongs in the JavaProgramming, or JDBC forums.
But the problem is because the updateDate method uses a java.sql.Date object and you are giving it a java.util.Date object. You have to convert from java.util.Date to java.sql.Date. See: [the api for java.sql.Date|http://java.sun.com/javase/6/docs/api/java/sql/Date.html] .
Edited by: stevejluke on Jul 21, 2008 5:43 PM

Java.sql.Date and java.util.Date - class loaded first in the classpath

I had two jar files which has java.util.Date and java.sql.Date class file. i want to know whether which class is loaded first in the classpath...
I like to change the order of loading the class at runtime...
Is there is any way to change the order of loading of class...
I may have different version of jar files for example xerces,xercesImpl. some of the code uses xerces ,some of the code uses xercesImpl..i had common classes.
I like to load the class with the same name according to the order i need..
Can we do all these in Run time ?????

I had two jar files which has java.util.Date and
java.sql.Date class file. i want to know whether
which class is loaded first in the classpath...
I like to change the order of loading the class at
runtime...
Is there is any way to change the order of loading of
class...
I may have different version of jar files for example
xerces,xercesImpl. some of the code uses xerces ,some
of the code uses xercesImpl..i had common classes.
I like to load the class with the same name according
to the order i need..
Can we do all these in Run time ?????That is meaningless.
The classes you are referring to are part of the Java API. Third party jars have no impact on that. And you can't change to the order because java.sql.Data is derived from java.util.Date. So the second must load before the first.
And if you have two jar files with those classes in them (and not classes that use them) then you either should already know how to use them or you should stop trying to do whatever you are doing because it isn't going to work.

Convert java.sql.Date to java.util.Date

How do i convert a java.sql.Date to java.util.Date ?
SimpleDateFormat formatter = new SimpleDateFormat ("dd/MM/yy HH:mm");
Date received=myresultset.getDate(1);
String utildate = formatter.format(received);
<%=utildate%>
Result : doesn't keep the HH:mm format
14/03/04 00:00
Ideas ?

There is simple way to do this job...
java.util.Date utilDate = new java.util.Date();
java.sql.Data sqlDate = new java.sql.Date(utilDate.getTime())
Enjoy Coding ! ! ! ! !

Java.sql.Date vs java.util.Date vs. java.util.Calendar

All I want to do is create a java.sql.Date subclass which has the Date(String) constructor, some checks for values and a few other additional methods and that avoids deprecation warnings/errors.
I am trying to write a wrapper for the java.sql.Date class that would allow a user to create a Date object using the methods:
Date date1 = new Date(2003, 10, 7);ORDate date2 = new Date("2003-10-07");I am creating classes that mimic MySQL (and eventually other databases) column types in order to allow for data checking since MySQL does not force checks or throw errors as, say, Oracle can be set up to do. All the types EXCEPT the Date, Datetime, Timestamp and Time types for MySQL map nicely to and from java.sql.* objects through wrappers of one sort or another.
Unfortunately, java.sql.Date, java.sql.Timestamp, java.sql.Time are not so friendly and very confusing.
One of my problems is that new java.sql.Date(int,int,int); and new java.util.Date(int,int,int); are both deprecated, so if I use them, I get deprecation warnings (errors) on compile.
Example:
public class Date extends java.sql.Date implements RangedColumn {
public static final String RANGE = "FROM '1000-01-01' to '8099-12-31'";
public static final String TYPE = "DATE";
   * Minimum date allowed by <strong>MySQL</strong>. NOTE: This is a MySQL
   * limitation. Java allows dates from '0000-01-01' while MySQL only supports
   * dates from '1000-01-01'.
public static final Date MIN_DATE = new Date(1000 + 1900,1,1);
   * Maximum date allowed by <strong>Java</strong>. NOTE: This is a Java limitation, not a MySQL
   * limitation. MySQL allows dates up to '9999-12-31' while Java only supports
   * dates to '8099-12-31'.
public static final Date MAX_DATE = new Date(8099 + 1900,12,31);
protected int _precision = 0;
private java.sql.Date _date = null;
public Date(int year, int month, int date) {
    // Deprecated, so I get deprecation warnings from the next line:
    super(year,month,date);
    if(! isWithinRange(this))
      throw new ValueOutOfRangeException((RangedColumn)this, "" + this);
public Date(String s) {
    super(0l);
    // Start Cut-and-paste from java.sql.Date.valueOf(String s)
    int year;
    int month;
    int day;
    int firstDash;
    int secondDash;
    if (s == null) throw new java.lang.IllegalArgumentException();
    firstDash = s.indexOf('-');
    secondDash = s.indexOf('-', firstDash+1);
    if ((firstDash > 0) & (secondDash > 0) & (secondDash < s.length()-1)) {
      year = Integer.parseInt(s.substring(0, firstDash)) - 1900;
      month = Integer.parseInt(s.substring(firstDash+1, secondDash)) - 1;
      day = Integer.parseInt(s.substring(secondDash+1));
    } else {
      throw new java.lang.IllegalArgumentException();
    // End Cut-and-paste from java.sql.Date.valueOf(String s)
    // Next three lines are deprecated, causing warnings.
    this.setYear(year);
    this.setMonth(month);
    this.setDate(day);
    if(! isWithinRange(this))
      throw new ValueOutOfRangeException((RangedColumn)this, "" + this);
public static boolean isWithinRange(Date date) {
    if(date.before(MIN_DATE))
      return false;
    if(date.after(MAX_DATE))
      return false;
    return true;
public String getRange() { return RANGE; }
public int getPrecision() { return _precision; }
public String getType() { return TYPE; }
}This works well, but it's deprecated. I don't see how I can use a java.util.Calendar object in stead without either essentially re-writing java.sql.Date almost entirely or losing the ability to be able to use java.sql.PreparedStatement.get[set]Date(int pos, java.sql.Date date);
So at this point, I am at a loss.
The deprecation documentation for constructor new Date(int,int,int)says "instead use the constructor Date(long date)", which I can't do unless I do a bunch of expensive String -> [Calendar/Date] -> Milliseconds conversions, and then I can't use "super()", so I'm back to re-writing the class again.
I can't use setters like java.sql.Date.setYear(int) or java.util.setMonth(int) because they are deprecated too: "replaced by Calendar.set(Calendar.DAY_OF_MONTH, int date)". Well GREAT, I can't go from a Date object to a Calendar object, so how am I supposed to use the "Calendar.set(...)" method!?!? From where I'm sitting, this whole Date deprecation thing seems like a step backward not forward, especially in the java.sql.* realm.
To prove my point, the non-deprecated method java.sql.Date.valueOf(String) USES the DEPRECATED constructor java.util.Date(int,int,int).
So, how do I create a java.sql.Date subclass which has the Date(String) constructor that avoids deprecation warnings/errors?
That's all I really want.
HELP!

I appreciate your help, but what I was hoping to accomplish was to have two constructors for my java.sql.Date subclass, one that took (int,int,int) and one that took ("yyyy-MM-dd"). From what I gather from your answers, you don't think it's possible. I would have to have a static instantiator method like:public static java.sql.Date createDate (int year, int month, int date) { ... } OR public static java.sql.Date createDate (String dateString) { ... }Is that correct?
If it is, I have to go back to the drawing board since it breaks my constructor paradigm for all of my 20 or so other MySQL column objects and, well, that's not acceptable, so I might just keep my deprecations for now.
-G

How to add doctype when generating XML from an arbitrary data structure

I was reading SUN's tutorial "Working with XML - PART IV: Using XSLT". Inside this tutorial, in 3, it talks about how to generate XML from an arbitrary data structure making use of a XMLReader and a Transformer. The example only shows adding elements. Is there a way to add DTD information in the XML generated, i.e. <!DOCTYPE ... >? What APIs can I use?
Thanks,
Alex

The simplest way seems to me is to use a XSL file for that. The <xsl:output> attributes doctype-system and doctype-public generate the DTD declaration <!DOCTYPE YOUR_ROOT SYSTEM "yourDTDfile.dtd"> and <!DOCTYPE YOUR_ROOT PUBLIC "yourDTDfile.dtd">, respectively.
When calling transformerInstance.transform() the XSLT processor performs the identity transformation - it just copies elements, attributes, content, processing instructions and comments to the result stream.
If you're using an xsl file for your transformation already, simply add <xsl:output doctype-system="yourDTDfile.dtd"/> to your existing XSL file.
If you're only using the identity transformation you'd need to change the line of code where you obtain the transformer instance from the TransformerFactory to:
t_factory.newTransformer(new StreamSource("test.xsl"));
and use this as test.xsl:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output doctype-system="yourDTDfile.dtd"/>
   
   <xsl:template match="*|@*|comment()|processing-instruction()|text()">
      <xsl:copy>
         <xsl:apply-templates select="*|@*|comment()|processing-instruction()|text()"/>
      </xsl:copy>
   </xsl:template>
</xsl:stylesheet>Good luck.

Casting oracle.jbo.domain.Date to java.util.Date and maintain more than day

oracle.jbo.domain.Date now = getOADBTransaction().getCurrentDBDate();
java.sql.Date currentDate = now.dateValue();
will truncate the hour, minute, second etc.
How can I avoid this?

No luck with that either.
oracle.jbo.domain.Date now = getOADBTransaction().getCurrentDBDate();
and then
java.sql.Timestamp currentDate = now.dateValue(); won't compile - gives class mis-match.
java.sql.Timestamp currentDate = now.getTime(); won't compile - getTime doesn't exist even though code insight suggests it.
java.sql.Timestamp currentDate = new java.sql.Timestamp(now.dateValue()); won't compile because no such constructor for Timestamp exists.

How i convert string(dd/mm/yyyy) to java.util.Date object

<%
   try{
         String date="1/8/2000";
         SimpleDateFormat ts= new SimpleDateFormat("dd-MMM-yyyy");
         Date sqlToday = new java.sql.Date(ts.parse(date).getTime());
        out.println("I am Here");
         out.println("Date:"+sqlToday);
        out.println("After Date:");
         catch(ParseException e){
              e.printStackTrace();
%>It is the code and i cann't get any result.
i am very new to JSTL and netbeans pls help me
Thanks in Advance

Write your format string to match the user input. ie yyyy-MM-dd (if that is what the user types in). MMM means month in short words - ie Jan, Feb, Mar etc
Once you parse it into a date, and get a java.sql.Date, you should use a prepared statement and the setDate() method.
Try
dd/MM

Storing data from Java Pogram(data in xml format) to SAP R/3

Hi,
I am having a java program which results me an xml.
I want to dump the data to SAP R/3.
What are the different ways/techniques should i use,to achieve the result?
Thanks for your reply,
regards,
cg

Hi,
In simle terms can you explain me in more detail.
lest say my java application produces xml as:
<xml>
<fname>myfirstname</fname>
<lname>mylastname</lname>
thanks for your reply,
reg
cg

How to add days to a date?

Dear all
I work with jdeveloper 11.1.4
I have created my BC.
I have 3 attribute on Vacation entity.
startDate
numberOfDays
endDate
I want to set the endDate value to be startDate+numberOfaDays
Can any one helps me.

You can achieve the same by writing a small piece of code in EntityImpl class or backing bean,depends on the use case.
if (VO.getCurrentRow().getAttribute("startDate") != null){
Calendar cal = Calendar.getInstance();
cal.setTime(convertDomainDateToUtilDate((oracle.jbo.domain.Date)VO.getCurrentRow().getAttribute("startDate")));
cal.add( Calendar.DATE, numberOfDays);
oracle.jbo.domain.Date domDate = convertUtilDateToDomainDate(cal.getTime());
VO.getCurrentRow().setAttribute("endDate",domDate );
In the above code the utility method "convertDomainDateToUtilDate" just converts the jbo.domain.Date to java.util.Date and "convertUtilDateToDomainDate" method does the reverse.
The code above holds good for backing bean but if You need to implement the same in EntityImpl then you just have to tinker around the code to get the proper entity attribute and set them properly.
Hope this helps.
-Sanjeeb

(Again) java.util.Date vs java.sql.Date

Hi there,
(Again) Im trying to understand the EXACT difference between
java.util.Date vs java.sql.Date.
Googling, I can see that this is a very "popular" subject, but I still
cannot figure out it exactly.
Many writers claim that java.sql.Date only stores the DATE part (yyyy-
mm-dd) but not the TIME part (hh:MM:ss) of a Date/Time value, but that
I can easily disprove:
java.util.Date ud = new java.util.Date(); java.sql.Date sd = new java.sql.Date(ud.getTime()); System.out.println(DateFormatUtils. format(ud, "yyyy-MM-dd HH:mm:ss.SSS")); System.out.println(DateFormatUtils. format(sd, "yyyy-MM-dd HH:mm:ss.SSS"));
Output:
2009-09-18 15:17:36.635 2009-09-18 15:17:36.635
So, apparently, java.sql.Date and java.util.Date have THE SAME
precision (at least down to the millisecs...).
And the official API documentation, really looks more confusing than
helpful to me::
*"java.sql.Date:*
*A thin wrapper around a millisecond value that allows JDBC to identify*
*this as an SQL DATE value. A milliseconds value represents the*
*number of milliseconds that have passed since January 1, 1970*
*00:00:00.000 GMT.*
*To conform with the definition of SQL DATE, the millisecond values*
*wrapped by a java.sql.Date instance must be 'normalized' by setting*
*the hours, minutes, seconds, and milliseconds to zero in the*
*particular time zone with which the instance is associated. "*
Exactly what means "an SQL DATE value" ? How EXACTLY does it differ
from a java.util.Date value?
Most importantly: WHY does JDBC need to distinguish between them?
And, here again: *"a java.sql.Date instance must be 'normalized' by*
*setting the hours, minutes, seconds, and milliseconds to zero in the*
*particular time zone..."*
What does that mean exactly? Apparently, the constructor doesnt
enforce this restriction, per the example above. So what's the REAL
point with this type, java.sql.Date?
Very greatful, if you can help me clarify this, once and for all.
TIA,

And the official API documentation, really looks more confusing than helpful to me:The problem is that you need to understand SQL as well as Java for this to make sense. It's not the Java API's job to tell you how your SQL database works - there's a myriad of subtle differences even when the DB is compliant with the SQL spec.
Most compliant databases support DATE, TIME, and TIMESTAMP values. DATE represents only a date. TIME represents only a time. TIMESTAMP represents both. There are further complicating factors, but that's roughly how it stands.
In Java the normal type for representing time is (or was when the API was created) the java.util.Date but this is a close approximation only to the TIMESTAMP value. In order to bring the two together the java.sql.Date, java.sql.Time and java.sql.Timestamp classes were created. Making them derive from java.util.Date was probably not a good idea.
java.util.Date suffers from a number of deficiencies. java.util.Calendar was supposed to address them but didn't really succeed. The JodaTime library is rather better, but it's all a lot more complicated than you might expect - partly because time management really is a much harder problem than it appears at first glance - there are timezones, leap years, leap seconds, the difference between astronomical and atomic time, and so on and so forth.

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