【Java多线程】生产者消费者模式 输出abcdabcdabcd.....

思路: 将LinkedList作为阻塞队列，容量为capacity

使用4个生产者线程，不断的按序生产abcd放入阻塞队列LinkedList中
使用1个消费者线程，从阻塞队列中取出数据并打印

@Slf4j(topic = "c.mainTest")
public class MainTest {

    static Object object = new Object();
    static int index = 0;
    static LinkedList<String> list = new LinkedList<>();
    static int capacity = 8;
    public static void main(String[] args) {
        new Thread(() -> {
            put("a", 0);
        }, "生产者1").start();
        new Thread(() -> {
            put("b", 1);
        }, "生产者2").start();
        new Thread(() -> {
            put("c", 2);
        }, "生产者3").start();
        new Thread(() -> {
            put("d", 3);
        }, "生产者4").start();
        new Thread(() -> {
            get();
        }, "消费者线程").start();
    }

    public static void put(String s, int target) {
        while (true) {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (object) {
                while (index % 4 != target || list.size()>=capacity) {
                    try {
                        object.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                log.debug("生产" + s);
                list.add(s);
                index++;
                object.notifyAll();
            }
        }
    }

    public static void get() {
        while (true) {
            synchronized (object) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                while (list.isEmpty()) {
                    try {
                        log.debug("队列为空");
                        object.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                String s = list.removeFirst();
                log.debug("取出数据" + s);
                object.notifyAll();
            }
        }
    }

}