Hi ,
U can sort using comparator by having a flag to distinguish what to sort on
for eg if u want to sort on product quantity
class Test implements comparable
{
boolean flgSortOnProductPrice=false;
....
.
.
.
public Test()
{
}
public setFlgSortOnProductPrice( boolean sort)
{
this.flgSortOnProductPrice=true;
//set all flags to false
}
public int compareTo(Object obj1,Object obj2)
{
lineitem l1=(lineitem) obj1;
lineitem l2=(lineitem) obj2;
i f(flgSortOnProductPrice)
{
return (l1.getProducttPrice()).compareTo(l2.getProductPrice())
}
else
.
.
.
.
}
}
now oto use this
Arraylist al1;
test =new Test();
/say sort on product price
test.setFlgSortOnProductPrice(true);
Collections.sort(al1,test);
to sort on proctcode
test.setFlag(true);
Collections.sort(al1,test);
Maybe this helps
Regards,
Gaurav
Jerson Chua wrote:
> Hi...
> For example, if I have a ShoppingCart object which contains an ArrayList of
> lineItem objects. Each lineitem object contains the attribute productName,
> productPrice, productCode, and quantity.
>
> Here's the expected behavior.
>
> For example... initially it's sorted by
> productCode, productName, productPrice, and quantity.
>
> If the user clicks productName then it will be sorted by
> productName, productCode, productPrice, and quantity.
>
> If the user clicks productPrice then it will be sorted by
> productPrice, productName, productCode, and quantity.
>
> and so on...
>
> Initially I planned to use Comparator but this can only be used for sorting
> a single column.
>
> How do I implement such functionality?
>
> thank you very much your help will be very much appreciated.
>
> Jerson
>
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Jerson Chua wrote:
> Hi...
> For example, if I have a ShoppingCart object which contains an ArrayList of
> lineItem objects. Each lineitem object contains the attribute productName,
> productPrice, productCode, and quantity.
>
> Here's the expected behavior.
>
> For example... initially it's sorted by
> productCode, productName, productPrice, and quantity.
>
> If the user clicks productName then it will be sorted by
> productName, productCode, productPrice, and quantity.
>
> If the user clicks productPrice then it will be sorted by
> productPrice, productName, productCode, and quantity.
>
> and so on...
>
> Initially I planned to use Comparator but this can only be used for sorting
> a single column.
>
> How do I implement such functionality?
>
> thank you very much your help will be very much appreciated.
> Jerson
>
> ___________________________________________________________________________
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> of the message "signoff SERVLET-INTEREST".
>
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