java.util.Vector.containsAll() Method

Description

The containsAll(Collection<?> c) method is used to check if this Vector contains all of the elements in the specified Collection.

Declaration

Following is the declaration for java.util.Vector.containsAll() method

public boolean containsAll(Collection<?> c)

Parameters

c − The input parameter is a collection whose elements will be tested for containment in this Vector

Return Value

true − Returns true if this Vector contains all of the elements in the specified collection.

Exception

NullPointerException − This exception is thrown if the specified collection is null.

Example

The following example shows the usage of java.util.Vector.containsAll() method.

package com.tutorialspoint;

import java.util.Vector;

public class VectorDemo {
   public static void main(String[] args) {

      // create three empty Vectors vec and vectest with an initial capacity of 4      
      Vector<Integer> vec = new Vector<Integer>(4);
      Vector<Integer> vectest = new Vector<Integer>(4);
      Vector<Integer> vecdiff = new Vector<Integer>(4);

      // use add() method to add elements in the vector vec
      vec.add(4);
      vec.add(3);
      vec.add(2);   

      // use add() method to add elements in the vector vectest
      vectest.add(4);
      vectest.add(3);
      vectest.add(2);

      // use add() method to add elements in the vector vecdiff
      vecdiff.add(4);
      vecdiff.add(3);
      vecdiff.add(12);

      // let us check vec and vectest
      System.out.println("Checking contents in vec and vectest :- "+vectest.containsAll(vec));   

      // let us check vec and vecdiff
      System.out.println("Checking contents in vec and vecdiff :- "+vecdiff.containsAll(vec)); 
   }
}

Let us compile and run the above program, this will produce the following result.

Checking contents in vec and vectest :- true
Checking contents in vec and vecdiff :- false

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