Java编写程序,请用java多线性方程实现20张票三个窗口按顺序依次卖票

我可以给你一个示例代码：public class TicketSeller {
public static void main(String[] args) {
int totalTickets = 20;

// 3 Windows
Object lock1 = new Object();
Object lock2 = new Object();
Object lock3 = new Object();

// Create 3 threads
Thread t1 = new Thread(new TicketSeller(totalTickets, lock1, lock2));
Thread t2 = new Thread(new TicketSeller(totalTickets, lock2, lock3));
Thread t3 = new Thread(new TicketSeller(totalTickets, lock3, lock1));

t1.start();
t2.start();
t3.start();
}

private int tickets;
private Object lockA, lockB;

public TicketSeller(int tickets, Object lockA, Object lockB) {
this.tickets = tickets;
this.lockA = lockA;
this.lockB = lockB;
}

public void run() {
while (true) {
synchronized (lockA) {
synchronized (lockB) {
if (tickets > 0) {
System.out.println(Thread.currentThread().getName() + "卖出了第" + tickets-- + "张票");
} else {
break;
}
}
}
}
}
}