Hi take a look at java.util.Arrays method (since 1.2)
public static void sort(Object[] a,
int fromIndex,
int toIndex,
Comparator c)
For your purpose you must store each output line into an array of objects. Each
of these objects
represents a row of your output. Each row-objects has individual data members
which
represent the columns of your output.
Then build a comparator for each column-sort. The comparator 'knows' which of
the rows data-members it's supposed to concider for sorting and then let the
sort method do the rest!
Peter
Ravi Shankar Jagarapu wrote:
> Hi all,
>
> I am retrieving data from the database with several
> fields, like for example first name, last name,
> join date, salary.
>
> This data is displayed by the servlet.
> Now my requirement, is that, if anyone clicks on first
> name, the data should now be displayed sorted on that
> field and if on salary then sorted on salary.
>
> I don't want to connect to the database each time and
> retrieve the same information just to sort the data
> which is already available to me.
>
> Can anyone suggest a better method? Would be great if
> you could give an example code.
>
> Many Thanks,
> Ravi.
>
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