removeAll : Remove collection of elements

boolean removeAll(Collection<?> c)

    Removes from this list all of its elements that are contained in the specified collection (optional operation).

import java.util.*;
class ListRemoveAll{
 public static void main(String args[]){
  List<Integer> myList = new ArrayList<> ();
  Set<Integer> mySet =new HashSet<> ();
  
  /* Add Elements to myList */
  for(int i=0; i < 10; i++){
   myList.add(i);
  }
  
  /* Add Elements to mySet */
  for(int i=5; i < 15; i++){
   mySet.add(i);
  }
  
  System.out.println("Elements in myList are ");
  System.out.println(myList +"\n");
  System.out.println("Elements in mySet are ");
  System.out.println(mySet +"\n");
  
  /* Remove mySet Data from myList */
  myList.removeAll(mySet);
  
  System.out.println("Elements in myList after removing mySet are");
  System.out.println(myList); 
 }
}

Output

Elements in myList are
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Elements in mySet are
[5, 6, 7, 8, 9, 10, 11, 12, 13, 14]

Elements in myList after removing mySet are
[0, 1, 2, 3, 4]

1. throws UnsupportedOperationException if the removeAll operation

is not supported by this list.

import java.util.*;
class ListRemoveAllUnsupport{
 public static void main(String args[]){
  List<Integer> myList = new ArrayList<> ();
  List<Integer> unmodifiable;
  Set<Integer> mySet =new HashSet<> ();
  
  /* Add Elements to myList */
  for(int i=0; i < 10; i++){
   myList.add(i);
  }
  
  /* Add Elements to mySet */
  for(int i=5; i < 15; i++){
   mySet.add(i);
  }
  
  unmodifiable = Collections.unmodifiableList(myList);
  
  System.out.println("Elements in unmodifiable list are ");
  System.out.println(unmodifiable +"\n");
  System.out.println("Elements in mySet are ");
  System.out.println(mySet +"\n");
  
  /* Remove mySet Data from unmodifiable list */
  unmodifiable.removeAll(mySet);
  
  System.out.println("Elements in unmodifiable after removing mySet are");
  System.out.println(unmodifiable); 
 }
}

Output

Elements in unmodifiable list are
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Elements in mySet are
[5, 6, 7, 8, 9, 10, 11, 12, 13, 14]

Exception in thread "main" java.lang.UnsupportedOperationException
        at java.util.Collections$UnmodifiableCollection.removeAll(Unknown Source)
        at ListRemoveAllUnsupport.main(ListRemoveAllUnsupport.java:26)

2. throws ClassCastException if the class of an element of this list is incompatible with the specified collection

3. throws NullPointerException if this list contains a null element and the specified collection does not permit null elements or if the specified collection is null

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