how to sort an arraylist

[srinivas_sistu]

hi all, I am having an arraylist which is holding data of a membercountry of an organisation... the data is like Formalname, Date of MemberShip, No of Shares.... etc... now i want to sort the arraylist based on the value of FormalName(in ascending or Descending order)

[Former Member · Accepted solution]

Hi,

See thread.

Regards,

Satyajit.

[Former Member · Accepted solution]

Hi srinivas,

if "records" is the name of your list, and it contains beans with data you want (Formalname, Date of MemberShip, No of Shares)

.............

Collections.sort(records, new listComparator());

.............

public class listComparator implements java.util.Comparator {

public int compare ( Object o1, Object o2 ) {

String acc1 = "";

String acc2 = "";

acc1 = ((MdmRecordBean) o1).getFormalname();

acc2 = ((MdmRecordBean) o2).getFormalname();

return acc1.compareTo(acc2);

}

}

Hope this help you,

Vito

[srinivas_sistu · Accepted solution]

hi Satyajit.

actually, in the link given by u they are comparing array having only one field...

[srinivas_sistu · Accepted solution]

what is this "MdmRecordBean) o1"?

[srinivas_sistu · Accepted solution]

i am using dynamic UIs here.. So when i am placing this code given by u it is saying only abstract or final is allowed(inside wddomodify())

[Former Member · Accepted solution]

Srinivas this is an example,

in this case MDMRecordbean is the type of the bean in the list.

You can create a bean with your attribute (Formalname, Date of MemberShip, No of Shares.... etc...). You have to create a method where you put in the listthe beans of type that you want. (Instead of a bean you can you others object).

When you call listComparator, you need to cast the Object (O1 and O2) to the type of bean.... basic in java, in fact Object is general.

Bye,

Vito

[Former Member · Accepted solution]

Hi,

How are you adding these data to the ArrayList? Are they objects of some class like for example "MemberData"? Do you finally want to sort the context node elements?

Regards,

Satyajit.