CounterForVisibility.java

public class CounterForVisibility extends Thread {

	private volatile static int count = 0;

	public static synchronized int getCount() {
		return count;
	}

	public synchronized void setCount(int count) {
		this.count = count;
	}


	public static void main(String[] args) throws InterruptedException {


		CounterForVisibility counter = new CounterForVisibility();

		counter.start();


		Thread.sleep(100);

		System.out.println("把计数器设置为1");
		counter.setCount(1);


	}

	@Override
	public void run() {
		while (Counter.getCount() == 0) {

		}
	}

}