gistfile1.txt

ublic class TwMain {

    private final static Semaphore SEMAPHORE = new Semaphore(2, true);

    public static void main(String[] args) {
        for (int i = 0; i < 6; i++) {
            StringBuilder name = new StringBuilder();
            for (int j = 0; j < i + 1; j++) {
                name.append(i);
            }
            Thread thread = new Thread(new Runner(name.toString()));
            thread.start();
        }
    }

    public static class Runner implements Runnable {

        private final String name;
        private long count = 0;

        public Runner(String name) {
            this.name = name;
        }

        @Override
        public void run() {
            while (count < 3000) {
                if (count % 100 == 0) {
                    if (count != 0) {
                        SEMAPHORE.release();
                    }
                    try {
                        SEMAPHORE.acquire();
                    } catch (InterruptedException e) {
                        e.printStackTrace(); // TODO generated
                    }
                    System.out.println((System.currentTimeMillis() % 100000) + "  -  " + name + " = " + count);
                }
                try {
                    Thread.sleep(10);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                    break;
                }
                count++;
            }
            System.out.println((System.currentTimeMillis() % 10000) + "  -  " + name + " finished.");
        }
    }

}