Thread Problem - (Thread Blocking Problems?)

Question

Hi Friends
In my program while using thread i found a problem in this code .
In this whlie running the 'msg' was printen only after all 5 inputs are given .
why i was not getting output after one input.why the thread out was waiting for remaining threads input.
my code is
import java.io.*;
class MyThread extends Thread
  BufferedReader bin;
   MyThread()
     super();
     start();
   public void run()
      try
       bin=new BufferedReader(new InputStreamReader(System.in));
       String msg=bin.readLine();
       System.out.println(msg);
      catch(IOException e)
         System.out.println(e);
public class Threads
     public static void main(String args[])
          for(int i=0;i<5;i++)
            new MyThread();
}

Answer 1

Hi Friends
In my program while using thread i found a problem
em in this code .
In this whlie running the 'msg' was printen only
after all 5 inputs are given .
why i was not getting output after one input.why
hy the thread out was waiting for remaining threads
input.Probably because of how the scheduler was rotating among the threads while waiting for input and queueing up output.
When you call readLine, that thread blocks until a line is available. So it probably goes to the next thread's readLine, and so on. All threads are probably blocked waiting for input before you enter a single character.
Something inside the VM has to coordinate the interaction with the console, and between that and your threads, the out stuff just doesn't get a chance to display right away.
In general, you can't predict the order of execution of separate threads.