List containsAll() method in Java with Examples Last Updated : 11 Dec, 2018 Comments Improve Suggest changes Like Article Like Report The containsAll() method of List interface in Java is used to check if this List contains all of the elements in the specified Collection. So basically it is used to check if a List contains a set of elements or not. Syntax: boolean containsAll(Collection col) Parameters: This method accepts a mandatory parameter col which is of the type of collection. This is the collection whose elements are needed to be checked if it is present in the List or not. Return Value: The method returns True if all elements in the collection col are present in the List otherwise it returns False. Exception: The method throws NullPointerException if the specified collection is NULL. Below programs illustrates the containsAll() method: Program 1: Java // Java code to illustrate containsAll() method import java.util.*; public class ListDemo { public static void main(String args[]) { // Creating an empty list List<String> list = new ArrayList<String>(); // Use add() method to add elements // into the List list.add("Welcome"); list.add("To"); list.add("Geeks"); list.add("4"); list.add("Geeks"); // Displaying the List System.out.println("List: " + list); // Creating another empty List List<String> listTemp = new ArrayList<String>(); listTemp.add("Geeks"); listTemp.add("4"); listTemp.add("Geeks"); System.out.println("Are all the contents equal? " + list.containsAll(listTemp)); } } Output: List: [Welcome, To, Geeks, 4, Geeks] Are all the contents equal? true Program 2: Java // Java code to illustrate containsAll() method import java.util.*; public class ListDemo { public static void main(String args[]) { // Creating an empty list List<Integer> list = new ArrayList<Integer>(); // Use add() method to add elements // into the List list.add(10); list.add(15); list.add(30); list.add(20); list.add(5); // Displaying the List System.out.println("List: " + list); // Creating another empty List List<Integer> listTemp = new ArrayList<Integer>(); listTemp.add(30); listTemp.add(15); listTemp.add(5); System.out.println("Are all the contents equal? " + list.containsAll(listTemp)); } } Output: List: [10, 15, 30, 20, 5] Are all the contents equal? true Reference: https://docs.oracle.com/javase/7/docs/api/java/util/List.html#containsAll(java.util.Collection) Comment More infoAdvertise with us Next Article List containsAll() method in Java with Examples G gopaldave Follow Improve Article Tags : Java Java-Collections Java-Functions java-list Practice Tags : JavaJava-Collections Similar Reads Java List Interface The List Interface in Java extends the Collection Interface and is a part of the java.util package. It is used to store the ordered collections of elements. In a Java List, we can organize and manage the data sequentially. Key Features:Maintained the order of elements in which they are added.Allows 15+ min read List add() Method in Java with Examples The List add() method adds (appends) an element to a list. It can be used for both ArrayList and LinkedList. 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