lock condition实现循环打印abc

package test;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class Test {
	public static void main(String[] args) {
		List<String> list = new ArrayList<String>();
		list.add("a");
		list.add("b");
		list.add("c");
		list.add("d");
		list.add("e");
		list.add("fn");
		new Myprin(list, 50).run();
	}
}
class Myprin {
	private final Lock lock = new ReentrantLock();
	int times;
	List<MyMap> maps = new ArrayList<MyMap>();
	MyMap map;
	String printStr;
	int n = 1;
	Myprin(List<String> list, int times) {
		for (String str : list) {
			map = new MyMap(str, lock.newCondition());
			maps.add(map);
		}
		printStr = list.get(0);
		this.times = times;
	}
	void () {
		for (int i = 0; i < maps.size() - 1; i++) {
			new Thread(
					new Print(maps.get(i).condition, maps.get(i + 1).condition, maps.get(i).str, maps.get(i + 1).str))
							.start();
		}
		new Thread(new Print(maps.get(maps.size() - 1).condition, maps.get(0).condition, maps.get(maps.size() - 1).str,
				maps.get(0).str)).start();
	}
	class MyMap {
		String str;
		Condition condition;
		MyMap(String str, Condition condition) {
			this.str = str;
			this.condition = condition;
		}
	}
	class Print implements Runnable {
		Condition thisCondition;
		Condition nextCondition;
		String thisStr;
		String nestStr;
		Print(Condition thisCondition, Condition nextCondition, String thisStr, String nestStr) {
			this.thisCondition = thisCondition;
			this.nextCondition = nextCondition;
			this.thisStr = thisStr;
			this.nestStr = nestStr;
			// System.out.println("thisStr:" + thisStr + ",nestStr:" + nestStr);
		}
		@Override
		public void () {
			while (times > 0) {
				if (printStr.equals(thisStr)) {
					lock.lock();
					try {
						if (thisStr.equals(maps.get(0).str)) {
							System.out.println("第：" + n++ + "次打印");
						} else if (thisStr.equals(maps.get(maps.size() - 1).str)) {
							times--;
						}
						System.out.print(thisStr);
						printStr = nestStr;
						if (times == 0) {
							for (MyMap map : maps) {
								map.condition.signalAll();
							}
							break;
						}
						nextCondition.signalAll();
						thisCondition.await();
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} finally {
						lock.unlock();
					}
				}
			}
		}
	}
}