Java ArrayList removeAll() Method

The removeAll() method of Java ArrayList class removes all the elements from a list that are contained in the specified collection.

Syntax:

Parameter:

"c": collection that contained elements to be removed from this list.

Return:

True if the original list changed as a result of this call.

Exception:

java.lang.NullPointerException: If the specified collection is null, or if the original list contains null elements and the specified collection does not permit null elements.

ClassCastException: if the class of an element of the original list is incompatible with the specified collection.

Example 1

Output:

 [A, B, C, D, E] [C, D, E] true [A, B] 

Example 2

Output:

 [A, B, C, D] 

Example 3

Output:

 null [a, b]