多线程通讯轮询卖票

package com.xp.test;

import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock;

public class ABC_Lock {

public static void main(String[] args) {
	Print print = new Print();

	// new Thread(new Runnable() {
	// @Override
	// public void run() {
	// for (int i = 1; i <= 34; i++) {
	// print.loopA(i);
	// }
	// }
	// }, "A").start();
	// new Thread(new Runnable() {
	// @Override
	// public void run() {
	// for (int i = 1; i <= 33; i++) {
	// print.loopB(i);
	// }
	// }
	// }, "B").start();
	// new Thread(new Runnable() {
	// @Override
	// public void run() {
	// for (int i = 1; i <= 33; i++) {
	// print.loopC(i);
	// }
	// }
	// }, "C").start();
	// }
	int i = 33;
	while (i > 0) {
		i--;
		new Thread(new Runnable() {
			@Override
			public void run() {
				print.loopA();
			}
		}, "A").start();
		new Thread(new Runnable() {
			@Override
			public void run() {
				print.loopB();
			}
		}, "B").start();
		new Thread(new Runnable() {
			@Override
			public void run() {
				print.loopC();
			}
		}, "C").start();
	}
	
}

}

class Print { private Lock lock = new ReentrantLock(); private Condition conditionA = lock.newCondition(); private Condition conditionB = lock.newCondition(); private Condition conditionC = lock.newCondition();

int tick = 100;
String mark = "a";

public void loopA() {
	lock.lock();
	try {
		if (!"a".equals(mark)) {
			try {
				conditionA.await();
			} catch (InterruptedException e) {
			}
		}
		System.out.println(Thread.currentThread().getName() + "完成售票，剩余： " + --tick);
		mark = "b";
		conditionB.signal();
	} finally {
		lock.unlock();
	}
}

public void loopB() {
	lock.lock();
	try {
		if (!"b".equals(mark)) {
			try {
				conditionB.await();
			} catch (InterruptedException e) {
			}
		}
		System.out.println(Thread.currentThread().getName() + "完成售票，剩余： " + --tick);
		mark = "c";
		conditionC.signal();
	} finally {
		lock.unlock();
	}
}

public void loopC() {
	lock.lock();
	try {
		if (!"c".equals(mark)) {
			try {
				conditionC.await();
			} catch (InterruptedException e) {
			}
		}
		System.out.println(Thread.currentThread().getName() + "完成售票，剩余： " + --tick);
		mark = "a";
		conditionA.signal();
	} finally {
		lock.unlock();
	}
}

}