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Offline Kommi

Junior Member




All opinions will be lined up and shot!


« Posted 2006-02-21 18:48:57 »

I am trying to use ArrayList's removeRange method but am getting the compile time error

"removeRange(int,int) has protected access in java.util.ArrayList"

How do I get around this? My code is just an instanciation ArrayList <Iteger> a = new ArrayList <Integer> (), and then a.removeRange(0, a.size())

Kommi
Offline blahblahblahh

JGO Coder


Medals: 1


http://t-machine.org


« Reply #1 - Posted 2006-02-21 19:48:27 »

Subclass / extend it.

Or ... dont use that method. If its protected, you shouldn't be using it.

malloc will be first against the wall when the revolution comes...
Offline swpalmer

JGO Coder


Exp: 12 years


Where's the Kaboom?


« Reply #2 - Posted 2006-02-21 20:39:20 »

Consider:

1  
a.removeAll(a.subList(start,end));


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Offline bcolter

Junior Newbie





« Reply #3 - Posted 2009-07-31 16:13:33 »

PERFECT...! Just ran across the same probem.

Thanks!
Offline ManaSink

Senior Newbie





« Reply #4 - Posted 2009-07-31 17:22:45 »


Consider:

1  
a.removeAll(a.subList(start,end));



This only works if the the objects stored implement equals(), and is pretty inefficient since it iterates over the lists doing equality checks.  subList() is required to return a mutable list backed by the parent, so changes there affect the original.  This should be much faster.

1  
a.subList(start,end).clear();


Actually, looking at the source, a.subList(start,end).clear() just calls a.removeRange(start,end),  hahahaha....

Grin



Offline pjt33
« Reply #5 - Posted 2009-08-01 08:41:38 »

Consider:

1  
a.removeAll(a.subList(start,end));


That can remove the wrong thing if you have duplicate elements in the list.
Offline i30817

Junior Member





« Reply #6 - Posted 2009-08-01 21:38:10 »

I only found sublist usefulness a little bit ago. Truly self-reflective api's are the work of the enlightened.
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