lock+condition实现两个线程循环打印奇偶数：0~100

/**
 * @author lanwei 2018-05-19
 */
public class ConditonPrintAB {

    public static void main(String[] a) {
        PrintAB printAB = new PrintAB();
        new Thread(() -> printAB.print1()).start();
        new Thread(() -> printAB.print2()).start();
    }


    public static class PrintAB {

        private Lock lock = new ReentrantLock();

        private Condition c1 = lock.newCondition();

        private Condition c2 = lock.newCondition();

        private volatile int state = 0;

        /**
         * 打印奇数
         */
        public void print1() {
            print(1, c1, c2);
        }

        /**
         * 打印偶数
         */
        public void print2() {
            print(0, c2, c1);
        }

        public void print(int flag, Condition cuerrentConditon, Condition nextConditin) {
            for (; ; ) {
                try {
                    lock.lock();
                    // 状态判断
                    while (state % 2 == flag) {
                        cuerrentConditon.await();
                    }
                    if (state > 100) {
                        return;
                    }
                    System.out.println(Thread.currentThread().getName() + ": " + state++);
                    nextConditin.signal();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } finally {
                    lock.unlock();
                }
            }
        }
    }
}