测试四种情况 静态变量 加volatile的静态变量 原子类 s

如何在这个类的基础上加线程池，阻塞队列，生产者 、消费者模型

Semaphore信号量

public class IncrementTestDemo {

    public static int count = 0;
    public static Counter counter = new Counter();
    public static AtomicInteger atomicInteger = new AtomicInteger(0);
    volatile public static int countVolatile = 0;

    public static void main(String[] args) {
        for (int i = 0; i < 10; i++) {
            new Thread() {
                public void run() {
                    //开10个线程
                    for (int j = 0; j < 1000; j++) {
                        //累加
                        count++;
                        counter.increment();
                        atomicInteger.getAndIncrement();
                        countVolatile++;
                    }
                }
            }.start();
        }
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("static count: " + count);
        System.out.println("Counter: " + counter.getValue());
        System.out.println("AtomicInteger: " + atomicInteger.intValue());
        System.out.println("countVolatile: " + countVolatile);
    }

}
class Counter {
    private int value;

    public synchronized int getValue() {
        return value;
    }

    public synchronized int increment() {
        return ++value;
    }

    public synchronized int decrement() {
        return --value;
    }
}