Question

I am new to Multithreading world, I am not sure how should I write a java application that can invoke x number of threads, if we pass x number of threads from the command prompt. Just Like if we are passing

java –jar pds_client_batch.jar <number of threads>

and here if number of threads is passed as 20 then it should run for twenty threads. Any simple example will be appreciated.

Answer 1

public class Example
{
  private class DumbThread implements Runnable
  {
    public void run()
    { 
      System.out.println("Thread ran");
    }
  }

  public static void main(String args[])
  {
    int input = Integer.parseInt(args[0]);
    for (int x = 0; x < input; x++)
      new Thread(new DumbThread()).start();
  }
}

Now, if you want it to do something useful…

Edit: made more complete. It still does nothing useful. Also it doesn’t do even basic error checking.