启动三个线程，id分别是0,1,2，输出012012012

gistfile1.java

public class ThreeThread {
	public static Long count = new Long(0);

	public static void main(String args[]) {
		for (int i = 0; i < 3; i++) {
			Thread t = new Thread() {
				@Override
				public void run() {
					int c = 3;
					while (c>0)
						synchronized (count) {
							long id = Long.valueOf(Thread.currentThread()
									.getName());
							if (count%3 == id) {
								System.out.print(id);
								count++;
								c--;
							}
						}
				}
			};
			t.setName(i + "");
			t.start();
		}
	}
}