java并发控制-无锁和加锁来实现交替打印奇偶数

加锁方式

    static int number = 0;
    static class Ji implements Runnable {
        private String name;

        public Ji(String name) {
            this.name = name;
        }

        @Override
        public void run() {
            while (number <= 100) {
                synchronized (WithoutWaitNotify.class) {
                    if ((number % 2) == 1) {
                        System.out.println(number + "  " + name);
                        number++;
                    }
                }
            }
        }
    }

    static class Ou implements Runnable {
        private String name;

        public Ou(String name) {
            this.name = name;
        }

        @Override
        public void run() {
            while (number <= 100) {
                synchronized (WithoutWaitNotify.class) {
                    if ((number % 2) == 0) {
                        System.out.println(number + "   " + name);
                        number++;
                    }
                }
            }
        }
    }

无锁方式

    static volatile int count;

    public static void main(String[] args) {
        new Thread(new Ji()).start();
        new Thread(new Ou()).start();
    }

    static class Ji implements Runnable {

        int ccount = 1;

        @Override
        public void run() {
            while (true) {
                if (count > 1000)
                    break;
                if (count == ccount) {
                    System.out.println("Ji: " + count);
                    ccount = count + 2;
                    count++;
                }
            }
        }
    }

    static class Ou implements Runnable {
        int ccount = 0;

        @Override
        public void run() {
            while (true) {
                if (count > 1000) {
                    break;
                }
                if (count == ccount) {
                    System.out.println("Ou: " + count);
                    ccount = count + 2;
                    count++;
                }
            }
        }
    }