面试题--三个线程循环打印ABC 10次：另类解决方法

看到网上有各种写法，但总感觉的看起来晦涩难懂。于是自己写了一个，如下：

import java.util.concurrent.atomic.AtomicBoolean;class Printer extends Thread{public AtomicBoolean canPrint;private String _text;private Printer _nextPrinter;Printer(String name){canPrint = new AtomicBoolean(false);this._text = name;}public void SetNextPrinter(Printer nextPrinter){this._nextPrinter = nextPrinter;}@Overridepublic void run(){int count = 10;while (count > 0){if(canPrint.compareAndSet(true, false)){count--;System.out.println(count +" - " + _text);_nextPrinter.canPrint.set(true);}}}}public class TestPrinter{public static void main(String[] args){Printer printerA = new Printer("A"); Printer printerB = new Printer("B");Printer printerC = new Printer("C \n----------------- \n");printerA.SetNextPrinter(printerB);printerB.SetNextPrinter(printerC);printerC.SetNextPrinter(printerA);printerA.canPrint.set(true);printerA.start();printerB.start();printerC.start();return;}}

输出如下：
9 - A
9 - B
9 - C 
----------------- 
8 - A
8 - B
8 - C 
----------------- 
7 - A
7 - B
7 - C 
----------------- 
6 - A
6 - B
6 - C 
----------------- 
5 - A
5 - B
5 - C 
----------------- 
4 - A
4 - B
4 - C 
----------------- 
3 - A
3 - B
3 - C 
----------------- 
2 - A
2 - B
2 - C 
----------------- 
1 - A
1 - B
1 - C 
----------------- 
0 - A
0 - B
0 - C 
-----------------