Java多线程信号量

Question

如果我在主类中启动了五个将运行parralell

的线程

final int TERMINAL_COUNT = 5;
    Semaphore semaphore = new Semaphore(1);
    Queue<Terminal> terminals = new LinkedList<>();

    for (int i = 1; i<= TERMINAL_COUNT; i++){
        terminals.offer(new Terminal(i, semaphore));
    }

    for(Terminal terminal : terminals) terminal.start();
 }

带有它们的课程看起来像

public class Terminal extends Thread {
private Dispetcher dispetcher;
private Semaphore semaphore;


public Terminal(int terminalId, Semaphore semaphore){
    dispetcher = new Dispetcher();
    this.semaphore = semaphore;
}

@Override
public void run() {
    try{
        ListIterator<Plane> pIt = dispetcher.getPlanes().listIterator();
        while (pIt.hasNext()){
            Plane p = pIt.next();

            if(!p.isArrived()) {
                //some code
                replacingPassangers(p);
            }
        }
    }catch (InterruptedException e){
        e.printStackTrace();
    }
}

private void replacingPassangers(Plane p) throws InterruptedException{
   semaphore.acquire();
    if(!p.isArrived()) {
        //replacing passangers
        p.setIsArrived(true);
    }
    semaphore.release();
}
}

所以我需要在乘客被1个线程替换后，其他人在if（！p.isArriving）条件的帮助下跳过方法逻辑。但是p.setIsArrived（true）;不会影响其他线程中的这个变量，因此所有线程都会通过这个条件......我该如何修复它呢？