java array and list

try this,

List<String> bannedAsList = new ArrayList<String>( Arrays.asList(blocked) ) ;

discard it, looks like asList itself returning ArrayList... what is the exception you get?

asList() returns a fixed size list
you need to create an ArrayList and copy the asList() into it (or add the elements from your array in a loop)

List bannedAsList = new ArrayList(Arrays.asList(blocked)); // this works !!!

ksivananth,

sorry buddy, your post wasn't there when i started

Following is the javadoc of asList function :

Returns a fixed-size list backed by the specified array. (Changes to the returned list "write through" to the array.) This method acts as bridge between array-based and collection-based APIs, in combination with Collection.toArray. The returned list is serializable and implements RandomAccess.

This method also provides a convenient way to create a fixed-size list initialized to contain several elements:

     List<String> stooges = Arrays.asList("Larry", "Moe", "Curly");
 
Parameters:
a the array by which the list will be backed
Returns:
a list view of the specified array


Lits returned is a fixed size and is a view of the specified array. Hence you are getting this exception.

>>sorry buddy, your post wasn't there when i started

no issues!

NOT GOOD:
Exception in thread "main" java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList

looks like you trying to cast the list returned from asList to ArrayList...

does the below works?
 List<String> bannedAsList = new ArrayList<String>( Arrays.asList(blocked) ) ;

NIO !
Exception in thread "main" java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList

Should be as mentioned above.
Maybe this will help?

String blocked[] = blockedString.split(",");
List unmodifiableBannedAsList = Arrays.asList(blocked); // this works !!!
//List we get back here is internal to Arrays called Arrays.ArrayList, we can't
//modify it.
//Lets create a new list so that we can add more information to it.

List bannedList = new java.util.ArrayList();
bannedList.addAll(unmodifiableBannedAsList);
bannedAsList.add("hello");

Hope that helps.
Sorry if i've step on anyones toes.

Thought you wanted to "add" to your list. That code won't let you add to it.