From owner-freebsd-java  Tue Oct  1  4:20:38 2002
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Date: Tue, 01 Oct 2002 09:44:12 +0200
From: Giulio Ferro <aurynkid@libero.it>
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To: freebsd-java@FreeBSD.ORG
Subject: Wrong thread behavior
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Native jdk 1.3.1p7

If we consider the following snippet:

public class SimpleThread extends Thread {
  private int countDown = 50;
  private static int threadCount = 0;
  private int threadNumber = ++threadCount;
  public SimpleThread() {
    System.out.println("Making " + threadNumber);
  }
  public void run() {
    while(true) {
      System.out.println("Thread " +
        threadNumber + "(" + countDown + ")");
      if(--countDown == 0) return;
    }
  }
  public static void main(String[] args) {
    for(int i = 0; i < 5; i++)
      new SimpleThread().start();
    System.out.println("All Threads Started");
  }
} ///:~


You can notice that the execution never breaks out of run() unless you 
explicitly put a sleep() or yield().
It goes on any single thread until the thread returns without 
automatically switching to the others.



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