import java.util.concurrent.atomic.AtomicLong;  
public class OrderNumberGenerator {  
    private static final AtomicLong orderIdGenerator = new AtomicLong(1); // 假設(shè)從1開始  
    // 線程任務(wù)，模擬出庫或入庫  
    static class OrderTask implements Runnable {  
        private final String type; // 出庫或入庫  
        public OrderTask(String type) {  
            this.type = type;  
        }  
        @Override  
        public void run() {  
            long orderId = orderIdGenerator.incrementAndGet(); // 線程安全地獲取下一個(gè)訂單號  
            System.out.println(Thread.currentThread().getName() + " 執(zhí)行 " + type + " 操作，訂單號：" + orderId);  
        }  
    }  
    public static void main(String[] args) {  
        // 創(chuàng)建并啟動(dòng)多個(gè)線程模擬并發(fā)操作  
        Thread t1 = new Thread(new OrderTask("出庫"), "出庫線程1");  
        Thread t2 = new Thread(new OrderTask("入庫"), "入庫線程1");  
        Thread t3 = new Thread(new OrderTask("出庫"), "出庫線程2");  
        Thread t4 = new Thread(new OrderTask("入庫"), "入庫線程2");  
        t1.start();  
        t2.start();  
        t3.start();  
        t4.start();  
        // 等待所有線程完成  
        try {  
            t1.join();  
            t2.join();  
            t3.join();  
            t4.join();  
        } catch (InterruptedException e) {  
            e.printStackTrace();  
        }  
    }  
}

import java.util.concurrent.atomic.AtomicLong;  
// 線程任務(wù)類，用于模擬出庫或入庫操作  
class OrderTask implements Runnable {  
    private final String type; // 出庫或入庫  
    private final AtomicLong orderIdGenerator; // 訂單號生成器  
    public OrderTask(String type, AtomicLong orderIdGenerator) {  
        this.type = type;  
        this.orderIdGenerator = orderIdGenerator;  
    }  
    @Override  
    public void run() {  
        // 線程安全地獲取下一個(gè)訂單號  
        long orderId = orderIdGenerator.incrementAndGet();  
        // 模擬出庫或入庫操作（這里只是打印信息）  
        System.out.println(Thread.currentThread().getName() + " 執(zhí)行 " + type + " 操作，訂單號：" + orderId);  
    }  
}  
public class OrderSystem {  
    // 訂單號生成器，假設(shè)從1開始  
    private static final AtomicLong orderIdGenerator = new AtomicLong(1);  
    public static void main(String[] args) {  
        // 創(chuàng)建并啟動(dòng)多個(gè)線程模擬并發(fā)操作  
        Thread t1 = new Thread(new OrderTask("出庫", orderIdGenerator), "出庫線程1");  
        Thread t2 = new Thread(new OrderTask("入庫", orderIdGenerator), "入庫線程1");  
        Thread t3 = new Thread(new OrderTask("出庫", orderIdGenerator), "出庫線程2");  
        Thread t4 = new Thread(new OrderTask("入庫", orderIdGenerator), "入庫線程2");  
        // 啟動(dòng)所有線程  
        t1.start();  
        t2.start();  
        t3.start();  
        t4.start();  
        // 等待所有線程完成（可選，取決于你是否需要等待所有操作完成后再繼續(xù)）  
        try {  
            t1.join();  
            t2.join();  
            t3.join();  
            t4.join();  
        } catch (InterruptedException e) {  
            e.printStackTrace();  
        }  
        // 如果不需要等待所有線程完成，可以省略上面的join調(diào)用  
        // ... 執(zhí)行其他操作  
    }  
}