ReentrantLoack的公平锁看起来没起效果，是什么原因？

public class Task extends Thread{
private String content;
private static ReentrantLock lock = new ReentrantLock(true);
private static CyclicBarrier barrier = new CyclicBarrier(2);

public Task(String content) {
    this.content = content;
}

@Override
public void run() {
    while(true){
        try{
            barrier.await();
            lock.lock();
            System.out.println(content);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

}

public static void main(String[] args) throws InterruptedException {
    Task task1 = new Task("A");
    Task task2 = new Task("B");
    task1.start();
    task2.start();
}

}