Java : Collection Framework : Vector (Retain Group of Elements)

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VectorExample.java

import java.util.ArrayList;
import java.util.Vector;

/*
 *  Example of retainAll(Collection<?> c) method. 
 */
public class VectorExample
{
    public static void main( String[] args )
    {
        Vector<Integer> vector = new Vector<Integer>();

        vector.add(20);
        vector.add(30);
        vector.add(40);
        vector.add(50);

        System.out.println("vector  : " + vector + "\n");

        ArrayList<Integer> arrayList = new ArrayList<Integer>();
        arrayList.add(20);
        arrayList.add(40);

        System.out.println("arrayList  : " + arrayList + "\n");

        /*
         * Retains only the elements in this Vector that are contained in the
         * specified Collection. In other words, removes from this Vector all of
         * its elements that are not contained in the specified Collection.
         */

        boolean isRetained = vector.retainAll(arrayList);

        System.out.println("isRetained  : " + isRetained );
        System.out.println("vector  : " + vector + "\n");

    }
}

Output

vector  : [20, 30, 40, 50]

arrayList  : [20, 40]

isRetained  : true
vector  : [20, 40]

To Download VectorDemoRetainAll Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/VectorDemoRetainAll.zip?attredirects=0&d=1

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