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  1. #1
    Join Date
    Oct 2010
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    Default Adding elements in array list and vectors using threads

    can any one tell me how to add 100 of elements in array list and vector using threads...actually i want to prove that array is not type safe and vector is type safe..i want to do this using 100 of threads..
    the code i tried is given below

    package javaapplication4;

    import java.util.*;
    class XThread extends Thread {
    ArrayList<Integer> list = new ArrayList<Integer>();

    public XThread( int i){


    public void run() {


    public class Main {

    public static void main(String argv[]) {
    ArrayList<Integer> list = new ArrayList<Integer>();

    Thread thread[] = new XThread[25];

    //Start the threads
    for(int i=0;i<25;i++){
    thread[i]=new XThread(i);


    this code always print a size of 1...

    plz help me...

  2. #2
    Norm's Avatar
    Norm is offline Moderator
    Join Date
    Jun 2008
    On vacation
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    prove that array is not type safe and vector is type safe
    Not sure what you mean by "type safe"?
    Your posted code doesn't have either an array or a vector.

    What is the posted code supposed to do?
    Why do you expect it to print out something different than what it does?

  3. #3
    al_Marshy_1981 is offline Senior Member
    Join Date
    Feb 2010
    Waterford, Ireland
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    Why would size ever be greater than 1? you make a new reference everytime in static main(), no idea what you are trying to achieve when you say you are proving array is not type safe, arrays wont compile without a type, do you mean arraylists?? still confused, since proper implementation of them require a type unless you are trying to break what java has provided for.

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