Why System.in is blocking other IO call

Question

I was trying this simple program to run some test...
package com.jpmc.ibtech.hycee.base;
import java.io.IOException;
public class TestThread {
      * @param args
      * @throws IOException
     public static void main(String[] args) throws IOException {
           (new Thread() {
               public void run() {
                    try {
                         sleep(8000);
                          LoadCompsFTP ftpc = new LoadCompsFTP();
                          ftpc.listNames();
                    } catch (Exception e) {
                         System.out.println("exception!!");
          }).start();
          System.out.println("test1");
          try {
               int b = System.in.read();
               System.out.println("read data from main thread=" + b);
          } catch (Exception e) {
               System.out.println("exception!!");
     }LoadCompsFTP() class uses apache commons FTP lib to connect to FTP server.What i observed is when main thread waits on the Systtem.in the connect method in the FTP lib is waiting..It connect's only after i enter anything on my input.basically after system.in ends.
I am not sure why.
I am running JDK 1.4.2 on windows XP

Answer 1

public LoadCompsFTP() {
          System.out.println("Creating FTP");
          ftpClient = new FTPClient();
          isValid = true;
     try {
                     System.out.println("Connecting FTP");
     ftpClient.connect("ftpgate.se.com");
     ftpClient.login("moran" + "@" + "ftp.omp.com","589");
     System.out.println("login FTP");
               } catch (Exception e) {
     isValid = false;
     public String[] listNames() throws IOException {
          System.out.println("Asking filename");
          String[] fileNames = ftpClient.listNames();
          System.out.println("Got filename");
          if (fileNames == null) {
               return new String[0];
          } else {
               return fileNames;
     }Message was edited by:
ashoknanashok