Java Vector containsAll() Method with Examples

by Online Tutorials Library July 22, 2022

Java Vector containsAll() Method

The containsAll() method of Java Vector class is used to check the vector which is in use contains all of the elements in the specified Collection or not. It returns true if this vector contains all of the elements in the Collection, otherwise returns false.

Syntax:

Following is the declaration of containsAll() method:

Parameter:

Parameter	Description	Required/Optional
c	It is a collection whose elements will be tested for containment in the vector which is in use.	Required

Returns:

The containsAll() method returns true if this vector contains all of the elements in the specified collection.

Exceptions:

NullPointerException– This method has thrown an exception if the specified collection is null.

Compatibility Version:

Java 1.2 and above

Example 1:

  import java.util.*;  public class VectorContainsAllExample1 {    public static void main(String arg[]) {  //Create an empty Vector  Vector<String> vc = new Vector<String>();  //Add values in the vector              vc.add(“Facebook”);              vc.add(“Whatsapp”);              vc.add(“Twitter”);              vc.add(“Instagram”);              //Create an empty list              List<String> list = new ArrayList<String>();              //Add values in the List              list.add(“Facebook”);              list.add(“Whatsapp”);              System.out.println(“Does vector contains all list elements?: “+vc.containsAll(list));              list.add(“Hindi100”);              System.out.println(“Does vector contains all list elements?: “+vc.containsAll(list));        }              }  

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Output:

Does vector contains all list elements?: true  Does vector contains all list elements?: false

Example 2:

  import java.util.Vector;  public class VectorContainsAllExample2 {    public static void main(String arg[]) {     //Create an empty Vector1     Vector<Integer>  vector1 = new Vector<Integer>();     //Add element in vwctor1     vector1.add(11);     vector1.add(22);     vector1.add(33);     vector1.add(44);     //Create an empty Vector2     Vector<Integer>  vector2 = new Vector<Integer>();     //Add element in vector2     vector2.add(22);     vector2.add(33);     //Check the existence of vector2 in the vector1     System.out.println(“Existence: “+vector1.containsAll(vector2));      //Lets add a new element to vector2           vector2.add(101);           //Checking again     System.out.println(“Existence: “+vector1.containsAll(vector2));      }              }  

Test it Now

Output:

Existence: true  Existence: false

Example 3:

  import java.util.Vector;  public class VectorContainsAllExample3 {    public static void main(String arg[]) {     //Create an empty Vector1     Vector<Integer>  vector1 = new Vector<Integer>(null);     //Create an empty Vector2     Vector<Integer>  vector2 = new Vector<Integer>();     //Check the existence of vector2 in the vector1     System.out.println(“Existence: “+vector1.containsAll(vector2));         }              }  

Test it Now

Output:

Exception in thread "main" java.lang.NullPointerException  at java.base/java.util.Vector.<init>(Vector.java:178)  at myPackage.VectorContainsAllExample3.main(VectorContainsAllExample3.java:6)

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Java Vector containsAll() Method with Examples

Java Vector containsAll() Method

Syntax:

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1:

Example 2:

Example 3:

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