Sort a collection in alphabetic order
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
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Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote: I need to sort my collection people in alphabetic order by lastname, firstname. Can anybody help me? Most algorithm books will give you more information than you want on sorting. Why not just do it in the query and let the db do it? Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Sort a collection in alphabetic order
Do it in the query.
select ID, FIRSTNAME, LASTNAME from people order by LASTNAME, FIRSTNAME
robert
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 1:17 PM
To: [EMAIL PROTECTED]
Subject: Sort a collection in alphabetic order
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
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SV: Sort a collection in alphabetic order
It is not possible.
The select is in a while (rs.next()) {} depending on another value. (Not
easy to explain!!)
I am a ware of normal SQL order by
-Oprindelig meddelelse-
Fra: Dave Newton [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:20
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote:
I need to sort my collection people in alphabetic order by lastname,
firstname. Can anybody help me?
Most algorithm books will give you more information than you want on
sorting.
Why not just do it in the query and let the db do it?
Dave
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
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Re: Sort a collection in alphabetic order
You could have your PeopleBean implement Comparable, which is pretty
easy, and then use TreeSet to create a sorted set using your compareTo
method.
-nash
On Monday, March 10, 2003, at 01:16 PM, Søren Blidorf wrote:
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp
page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
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Re: Sort a collection in alphabetic order
I concur with Nash. Use a Comparator Object for this. Itis in the
java.util package.
Dave Patton
On Mon, 2003-03-10 at 10:27, nash e. foster wrote:
You could have your PeopleBean implement Comparable, which is pretty
easy, and then use TreeSet to create a sorted set using your compareTo
method.
-nash
On Monday, March 10, 2003, at 01:16 PM, Søren Blidorf wrote:
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp
page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
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David H. Patton
[EMAIL PROTECTED]
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Re: Sort a collection in alphabetic order
http://edhill.its.uiowa.edu/display-0.8/
Robert Taylor wrote:
Do it in the query.
select ID, FIRSTNAME, LASTNAME from people order by LASTNAME, FIRSTNAME
robert
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 1:17 PM
To: [EMAIL PROTECTED]
Subject: Sort a collection in alphabetic order
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
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RE: Sort a collection in alphabetic order
Since you are in a while(rs.next()) context, why not sort on insertion?
Just pop your results into a Vector (or other collection) in sort-order.
Depending upon the number of elements expected, you could speed the
insertion using a number of methods. If your lists are relatively small,
it may be efficient to just start at the beginning of the vector and
walk through it looking for the insertion point.
-david-
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 1:25 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
It is not possible.
The select is in a while (rs.next()) {} depending on another value. (Not
easy to explain!!)
I am a ware of normal SQL order by
-Oprindelig meddelelse-
Fra: Dave Newton [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:20
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote:
I need to sort my collection people in alphabetic order by lastname,
firstname. Can anybody help me?
Most algorithm books will give you more information than you want on
sorting.
Why not just do it in the query and let the db do it?
Dave
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: Sort a collection in alphabetic order
Comparable is always a good idea. But I am curious to know why you are
unable to do a re-SELECT statement?
-Original Message-
From: David Haynes [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 3:49 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Since you are in a while(rs.next()) context, why not sort on insertion?
Just pop your results into a Vector (or other collection) in sort-order.
Depending upon the number of elements expected, you could speed the
insertion using a number of methods. If your lists are relatively small,
it may be efficient to just start at the beginning of the vector and
walk through it looking for the insertion point.
-david-
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 1:25 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
It is not possible.
The select is in a while (rs.next()) {} depending on another value. (Not
easy to explain!!)
I am a ware of normal SQL order by
-Oprindelig meddelelse-
Fra: Dave Newton [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:20
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote:
I need to sort my collection people in alphabetic order by lastname,
firstname. Can anybody help me?
Most algorithm books will give you more information than you want on
sorting.
Why not just do it in the query and let the db do it?
Dave
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
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RE: Sort a collection in alphabetic order
Although I don't know anything about Soren's specific problem, I have
had times where the database is protected by a bean and the process of
having a new data access method on the bean is simply too complex to be
believed (i.e. you have about a gazillion review processes to go
through). In these cases, I have found it sometimes useful to take the
data as it comes and massage it locally.
-david-
-Original Message-
From: apachep2 [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 3:54 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Comparable is always a good idea. But I am curious to know why you are
unable to do a re-SELECT statement?
-Original Message-
From: David Haynes [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 3:49 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Since you are in a while(rs.next()) context, why not sort on insertion?
Just pop your results into a Vector (or other collection) in sort-order.
Depending upon the number of elements expected, you could speed the
insertion using a number of methods. If your lists are relatively small,
it may be efficient to just start at the beginning of the vector and
walk through it looking for the insertion point.
-david-
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 1:25 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
It is not possible.
The select is in a while (rs.next()) {} depending on another value. (Not
easy to explain!!)
I am a ware of normal SQL order by
-Oprindelig meddelelse-
Fra: Dave Newton [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:20
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote:
I need to sort my collection people in alphabetic order by lastname,
firstname. Can anybody help me?
Most algorithm books will give you more information than you want on
sorting.
Why not just do it in the query and let the db do it?
Dave
-
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RE: Sort a collection in alphabetic order
Keep in mind Strings implement Comparable. So if the lastName field of your
PeopleBean is a String it makes the local sorting that much easier (no need to make
changes to the PeopleBean). You can just do the comparisons based on the lastName
field (or any other field that implements Comparable).
-Original Message-
From: David Haynes [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 12:59 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Although I don't know anything about Soren's specific problem, I have
had times where the database is protected by a bean and the process of
having a new data access method on the bean is simply too complex to be
believed (i.e. you have about a gazillion review processes to go
through). In these cases, I have found it sometimes useful to take the
data as it comes and massage it locally.
-david-
-Original Message-
From: apachep2 [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 3:54 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Comparable is always a good idea. But I am curious to know why you are
unable to do a re-SELECT statement?
-Original Message-
From: David Haynes [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 3:49 PM
To: 'Struts Users Mailing List'
Subject: RE: Sort a collection in alphabetic order
Since you are in a while(rs.next()) context, why not sort on insertion?
Just pop your results into a Vector (or other collection) in sort-order.
Depending upon the number of elements expected, you could speed the
insertion using a number of methods. If your lists are relatively small,
it may be efficient to just start at the beginning of the vector and
walk through it looking for the insertion point.
-david-
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: March 10, 2003 1:25 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
It is not possible.
The select is in a while (rs.next()) {} depending on another value. (Not
easy to explain!!)
I am a ware of normal SQL order by
-Oprindelig meddelelse-
Fra: Dave Newton [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:20
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
On Mon, 2003-03-10 at 13:16, Søren Blidorf wrote:
I need to sort my collection people in alphabetic order by lastname,
firstname. Can anybody help me?
Most algorithm books will give you more information than you want on
sorting.
Why not just do it in the query and let the db do it?
Dave
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
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SV: Sort a collection in alphabetic order
Sorry, but I can't get it to work.
Does any body have a simple example I can look at?
Soren
-Oprindelig meddelelse-
Fra: nash e. foster [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:27
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
You could have your PeopleBean implement Comparable, which is pretty
easy, and then use TreeSet to create a sorted set using your compareTo
method.
-nash
On Monday, March 10, 2003, at 01:16 PM, Søren Blidorf wrote:
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp
page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
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are not the intended recipient, you are hereby notified that any use,
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prohibited. If you have received this communication in error, please
destroy all copies of this message and its attachments and notify us
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RE: Sort a collection in alphabetic order
Try this:
import org.apache.commons.beanutils.BeanComparator;
Collections.sort(people, new BeanComparator(lastname));
Charlene
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 4:33 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
Sorry, but I can't get it to work.
Does any body have a simple example I can look at?
Soren
-Oprindelig meddelelse-
Fra: nash e. foster [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:27
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
You could have your PeopleBean implement Comparable, which is pretty
easy, and then use TreeSet to create a sorted set using your compareTo
method.
-nash
On Monday, March 10, 2003, at 01:16 PM, Søren Blidorf wrote:
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp
page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
-
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SV: Sort a collection in alphabetic order
Thanks a million.
You just made my day.
Soren
-Oprindelig meddelelse-
Fra: Yan, Charlene [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 23:12
Til: Struts Users Mailing List
Emne: RE: Sort a collection in alphabetic order
Try this:
import org.apache.commons.beanutils.BeanComparator;
Collections.sort(people, new BeanComparator(lastname));
Charlene
-Original Message-
From: Søren Blidorf [mailto:[EMAIL PROTECTED]
Sent: Monday, March 10, 2003 4:33 PM
To: 'Struts Users Mailing List'
Subject: SV: Sort a collection in alphabetic order
Sorry, but I can't get it to work.
Does any body have a simple example I can look at?
Soren
-Oprindelig meddelelse-
Fra: nash e. foster [mailto:[EMAIL PROTECTED]
Sendt: 10. marts 2003 19:27
Til: Struts Users Mailing List
Emne: Re: Sort a collection in alphabetic order
You could have your PeopleBean implement Comparable, which is pretty
easy, and then use TreeSet to create a sorted set using your compareTo
method.
-nash
On Monday, March 10, 2003, at 01:16 PM, Søren Blidorf wrote:
Hi.
I need to sort my collection people in alphabetic order by lastname,
firstname.
Can anybody help me?
I guess I should do it in the Action and not when displayed in jsp
page.
Collection people = new ArrayList();
while( rs.next() ) {
PeopleBean pb = new PeopleBean();
pb.setId(rs.getInt(ID));
pb.setFirstname( rs.getString( FIRSTNAME ));
pb.setLastname( rs.getString( LASTNAME ));
}
people.add( pb );
Søren Blidorf
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