java.lang.UnsupportedOperationException

Core Java

Jay

Asked on May 26, 2013

Hi friends, I am adding element in the list returned by Collections.nCopies and got below error.

Any clue?

Exception in thread "main" java.lang.UnsupportedOperationException

at java.util.AbstractList.add(Unknown Source)

Bob11

Replied on May 26, 2013

The List in which you are adding the content are immutable. The list are immutable if returned by

Collections.nCopies and Collections.emptyList

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