Set removeAll() Method in Java

In Java, the removeAll() method is part of the Collection interface. It is used to remove all elements from a collection that are present in another collection.

Example 1: This example demonstrates how the removeAll() method removes all elements from the first set that are also present in the second set.

Set1 before removeAll(): [Geek4, Geek3, Geek2, Geek1]
Set1 after removeAll(): [Geek2, Geek1]

Syntax of removeAll() Method

boolean removeAll(Collection<?> c)

• Parameter: The collection "c" contains the elements to be removed from the calling collection. If an element in c matches any element in the original collection, it will be removed.
• Return Type: This method return "true" if elements are removed, otherwise it return "false".

Example 2: This example shows how removeAll() returns a boolean indicating whether any elements were removed from the first set by comparing it to the second set.