CopyOnWriteArrayList was introduced in JDK5, Which will be used to avoid the java.util.ConcurrentModificationException while modifying List by multiple threads or inside loop.
below sample will show the difference.
This...
Sunday, August 26, 2012
Saturday, August 25, 2012
Find Number of duplicates present in a ArrayList
To find the number of occurrences of duplicate integer present in List, first we will create temp List which will have no duplicates and then use collection frequecy() function to get the occurrence of duplicate number in original list.
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