有三个线程ID分别是A、B、C,用多线程编程实现，在屏幕上循环打印10次ABCABC…
迅雷的一道面试题：
题目：有三个线程ID分别是A、B、C,请用多线程编程实现，在屏幕上循环打印10次ABCABC…
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public class TestThread {/** * @author lucky */public static void main(String[] args) {new Thread(new TestRun("A")).start();new Thread(new TestRun("B")).start();new Thread(new TestRun("C")).start();}}class TestRun implements Runnable {private String name;private static String flag = "A";private int count = 10;TestRun(String name) {this.name = name;}@Overridepublic void run() {while (count > 0) { synchronized (flag) { if (flag.equals(name)) {System.out.print(name);count--;if (name.equals("A"))flag = "B";if (name.equals("B"))flag = "C";if (name.equals("C"))flag = "A";}}}}}PS：其实这里可以不用synchronized (flag)也能输出正确结果，但会造成线程空转，就不大好了