If an element from the passed-in collection is in the list multiple times, all instances are removed.
import java.util.ArrayList;
import java.util.List;
public class MainClass {
public static void main(String args[]) throws Exception {
List list = new ArrayList();
list.add("A");
list.add("B");
list.add("C");
List list2 = new ArrayList();
list2.add("A");
list2.add("B");
list2.add("C");
list.removeAll(list2);
System.out.println(list);
}
}
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