Java ArrayList containsAll() Method

December 13, 2022

What ia an ArrayList?

Arraylist is a part of collection framework in java. It contains some inbuilt function like replaceAll() function which can be found in the java.util.ArrayList Package.It implements the List interface of the collections framework.The arrayList class have many inbuilt methods, one of those method is containsAll() method

On this page we will discuss about theArrayList containsAll() Method

Java ArrayList containsAll() Method

The ArrayList class in java have several inbuilt methods which can be used to perform different operations. One of the method is ArrayList contailsAll() method ,which is used to check if the arraylist contains all the element of the other list/collection or not.

Syntax :

arraylist.containsAll(collection c);

Parameters:

This methods takes a single parameter collection, 
whose elements are needed to be checked if they are present in the list or not.

Return Value:

True : If all the elements of the collection are present in the list.
False : If all the elements of the collection are not present in the list.

Exceptions:

This method throws a null pointer exception if the collection is empty.

ArrayList replaceAll() Method

ArrayList Iterator() Method

ArrayList addAll() Function

Arraylist Clear() Function

Arraylist Clone() Function

ArrayList containsAll() Method

Example :

Run

import java.util.*;

public class Main
{
  public static void main (String args[])
  {
    // Creating an empty Arraylist
    List < String > list = new ArrayList < String > ();

    // Use add() method to add elements
    // into the List
    list.add ("Welcome");
    list.add ("To");
    list.add ("Prep");
    list.add ("Insta");
    list.add ("Class");

    // Display the list
    System.out.println ("List: " + list);

    // Creating another empty List
    List < String > listTemp = new ArrayList < String > ();

    // add elements to listTemp
    listTemp.add ("Prep");
    listTemp.add ("Class");
    listTemp.add ("Insta");

    // Creating another empty list
    List < String > listTemp2 = new ArrayList < String > ();

    // add elements to listTemp2

    listTemp2.add ("Prep");
    listTemp2.add ("Java");
    listTemp2.add ("Insta");


    System.out.println ("list contains all the elements of listTemp :" +
			list.containsAll (listTemp));
    System.out.println ("list contains all the elements of listTemp2 :" +
			list.containsAll (listTemp2));

  }
}

Output :

List: [Welcome, To, Prep, Insta, Class]
list contains all the elements of listTemp :true
list contains all the elements of listTemp2 :false

What happened above : In the above example when the containsAll() method is called the list conatains all the elements of listTemp that's why it returns true, while when the containsAll() method called second time the list does not contains all the elements of listTemp2 so it returns false.

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Java ArrayList containsAll() Method

What ia an ArrayList?

Java ArrayList containsAll() Method

Syntax :

Parameters:

Return Value:

Exceptions:

ArrayList containsAll() Method

Example :

Output :

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