Help!!! Thread problem, SOS

Question

can anyone help me figure out why does this program halts if I do not remove t.setDaemon(true); I drives me crazy, I hate thread.
public class TestRead extends Thread {
  AsyncReadSocket ars;
  /** Creates a new instance of TestRead */
  public TestRead(AsyncReadSocket ars) {
    super("ReaderThread");
    this.ars = ars;
  public void run() {
    System.out.println("current Thread " + Thread.currentThread().getName());
    System.out.println("Data is " + ars.getResult());
   * @param args the command line arguments
  public static void main(String[] args) {
    System.out.println("current Thread " + Thread.currentThread().getName());
    AsyncReadSocket ars = new AsyncReadSocket("myhost", 100);
    Thread t = new Thread(ars);
    t.setName("ars");
    t.setDaemon(true);      // remove and works fine
    t.start();
    new TestRead(ars).start();
    System.out.println("current Thread " + Thread.currentThread().getName());
class AsyncReadSocket implements Runnable{
  StringBuffer result;
  TestThread[] testThread;
  AsyncReadSocket(String host, int port) {
    result = new StringBuffer(host);
    testThread  = new TestThread[100];
    for(int i=0; i < testThread.length; i++) {
      testThread[i] = new TestThread();
  public void run() {
    for(int i = 0; i < testThread.length; i++) {
      System.out.println("test Thread id " + i);
      Thread t = new Thread(testThread);
t.start();
public String getResult() {
String reader = Thread.currentThread().getName();
System.out.println("Current Thread Name: " + reader);
if(reader.startsWith("Reader")) {
String retval = result.toString();
result = new StringBuffer();
return retval;
} else
return "";
class TestThread implements Runnable{
public void message() {
System.out.println("TestThread.message() current Thread " + Thread.currentThread().getName());
public void run() {
message();

Answer 1

for(int i = 0; i < testThread.length; i++) {  --> halt point
System.out.println("test Thread id " + i);
Thread t = new Thread(testThread);
t.start();