Sorting list of Bean

[Em Aiy]

I have a bean class

public class MyBean{
  int someId;
  String field1,
  String field2,
  Date date;
 
  /* Getters and Setters */
}

This class is being retrieved to my by hibernate in form of list. I need to implementing sorting on it. I just read that i need to Comparable interface on it and then i can do the rest.

I have one question

What if i need to sort the List of this bean on different columns i.e at one place may be i need sorting at field1 and at some place may be i need at date and on the other place i'll be looking to sort the list on id.

What could be the best possible way of doing this?

[Wirianto Djunaidi]

You use Comparator instead. You create a Comparator for each of your special case and use it with

Collections.sort(Collection, Comparator)

[Em Aiy]

For this I'd have to implement the sort method (which is not a problem). but that method can have only one SORTING rule i.e; either sort on field1, or field2 or date.

What i want is something which can help me sort the List on my require field.

[Thomas Thevis]

Originalliy posted by Muhammad Ali:
For this I'd have to implement the sort method.

Actually not. Wirianto Djunaidi is quite right. Have a look at the java.util.Comparator interface. You don't have to implement sort(), but to provide a Comparator which performs a comparison on pairs of your bean objects. For each column to sort, you can provide a different Comparator.

Regards,
Thomas

[Rob Spoor]

"Muhammad Ali",

Please read your private messages regarding an important announcement.

Thank you,

Rob

[steve souza]

google with these keywords or similar ones and you should find how to do this...

java comparator multiple fields

[Em Aiy]

That really helped. Thanks guys