參考ArrayBlockingQueue

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;

public class DemoBlockList {
    private ReentrantLock lock = new ReentrantLock();

    private Condition isEmpty = lock.newCondition();

    
 
private Condition isFull = lock.newCondition();

    private List<String> list;
    private int count;

    public DemoBlockList(int max) {
        this.list = new ArrayList<>(max);
        this.count = max;
    }

    public void put(String val) throws InterruptedException {
        ReentrantLock lock 
 
= this.lock;
        lock.lockInterruptibly();
        try {
            while (list.size() == count) {
                this.isFull.await();
            }
            list.add(val);
            count++;
            this.isEmpty.signalAll();
        } catch (Exception ex) {
            ex.printStackTrace();
        } 
 
finally {
            lock.unlock();
        }
    }

    public String take() throws InterruptedException {
        ReentrantLock lock = this.lock;
        lock.lockInterruptibly();
        try {
            while (list.size() == 0) {
                this.isEmpty.await();
            }
            this.isFull.signalAll();
            count--;
            return list.remove(0);
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            lock.unlock();
        }
        return null;
    }
}

    public static void main(String[] args) {

        DemoBlockList demoBlockList = new DemoBlockList(10);
        List<Thread> pList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Thread p = new Thread(new Runnable() {
                @Override
                public void run() {
                    int i = 0;
                    while (true) {
                        try {
                            Thread.sleep(1000);
                            String val = Thread.currentThread().getName() + ",值=" + i;
                            demoBlockList.put(val);
                            System.out.println(Thread.currentThread().getName() + "儲存資料value=" + val);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        i++;
                    }
                }
            });
            p.setName("生產者執行緒-" + i);
            pList.add(p);
        }
        for (int i = 0; i < 10; i++) {
            pList.get(i).start();
        }
        List<Thread> cList = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            Thread c = new Thread(new Runnable() {
                @Override
                public void run() {
                    int i = 0;
                    while (true) {
                        try {
                            Thread.sleep(500);
                            String s = demoBlockList.take();
                            System.out.println(Thread.currentThread().getName() + "-獲得資料value=" + s);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        i++;
                    }
                }
            });
            c.setName("消費者執行緒-" + i);
            cList.add(c);
        }
        for (int i = 0; i < 10; i++) {
            cList.get(i).start();
        }
}