What is difference between Vector and ArrayList in Java?

-
  • One of the important interview question in java specially from Experience candidate
Vector :-

         /*
         * Vector is synchronized and thread-safe.
         * Performance wise slower then ArrayList.
         * One Thread is running at a time.
         * Once thread got completed it gives lock to other thread
         * Thread Safe
         */


 ArrayList :-
       /*
         * ArrayList is not synchronized nor thread-safe.
         * Performance wise faster then Vector.
         * multiple Threads is running at a time.
         * Not Thread Safe
         */


Programme



/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package highleveljava;

import java.util.*;

/**
 *
 * @author Admin
 */
public class ArrayListandVector {

    public Vector vector;
    public List list;
    public String fname = "Ajeet";
    public String tname = "Antrish";
    public String lname = "Anand";

    public void compareALVC() {
        vector = new Vector();
        /*
         Add Some Data into Vector
         */

        vector.add(fname);
        vector.add(tname);
        vector.add(lname);

        System.out.println("Vector data is " + vector);

        /*
         * Vector is synchronized and thread-safe.
         * Performance wise slower then ArrayList.
         * One Thread is running at a time.
         * Once thread got completed it gives lock to other thread
         * Thread Safe
         */
        list = new ArrayList();
        /*
         Add Some Data into ArrayList
         */
        list.add(fname);
        list.add(tname);
        list.add(lname);

        System.out.println("List data is " + list);


        /*
         * ArrayList is not synchronized nor thread-safe.
         * Performance wise faster then Vector.
         * multiple Threads is running at a time.
         * Not Thread Safe
         */
    }

    public static void main(String[] args) {

        ArrayListandVector classobject = new ArrayListandVector();
        classobject.compareALVC();
    }

}
 

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