AbstractSequentialList conatinsAll() method in Java with Example

The containsAll() method of Java AbstractSequentialList is used to check whether two Collections contain the same elements or not. It takes one collection as a parameter and returns True if all of the elements of this collection is present in the other collection.

Syntax:

public boolean containsAll(Collection C)

Parameters: The parameter C is a Collection. This parameter refers to the collection whose elements occurrence is needed to be checked in this collection.

Return Value: The method returns True if this collection contains all the elements of other Collection otherwise it returns False.

Below programs illustrate the AbstractSequentialList.conatinsAll() method:

Program 1:

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// Java code to illustrate
// AbstractSequentialList containsAll()
  
import java.util.*;
  
class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractSequentialList<String>
            abs = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs.add("Geeks");
        abs.add("for");
        abs.add("Geeks");
        abs.add("10");
        abs.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 1: "
                           + abs);
  
        // Creating another empty Collection
        AbstractSequentialList<String>
            abs2 = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs2.add("Geeks");
        abs2.add("for");
        abs2.add("Geeks");
        abs2.add("10");
        abs2.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 2: "
                           + abs2);
  
        // Check if the collection
        // contains same elements
        System.out.println("\nBoth the collections same: "
                           + abs.containsAll(abs2));
    }
}

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Output:

AbstractSequentialList 1: [Geeks, for, Geeks, 10, 20]
AbstractSequentialList 2: [Geeks, for, Geeks, 10, 20]

Both the collections same: true

Program 2:

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// Java code to illustrate boolean containsAll()
  
import java.util.*;
  
class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractSequentialList<String>
            abs = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs.add("Geeks");
        abs.add("for");
        abs.add("Geeks");
  
        // prints the list
        System.out.println("AbstractSequentialList 1: "
                           + abs);
  
        // Creating another empty Collection
        AbstractSequentialList<String>
            abs2 = new LinkedList<String>();
  
        // Use add() method to
        // add elements in the collection
        abs2.add("10");
        abs2.add("20");
  
        // prints the list
        System.out.println("AbstractSequentialList 2: "
                           + abs2);
  
        // Check if the collection
        // contains same elements
        System.out.println("\nAre both collections same: "
                           + abs.containsAll(abs2));
    }
}

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Output:

AbstractSequentialList 1: [Geeks, for, Geeks]
AbstractSequentialList 2: [10, 20]

Are both collections same: false


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