多线程面试

public class Test {
    private static volatile Boolean b = true;
    public static void main(String[] args) throws InterruptedException {
        new Thread() {
            @Override
            public void run() {
                for(;;) {
                    if(b == !b) {
                        System.out.println("----------b:"+b);
                        System.exit(0);
                    }else {
                        System.out.println("=");
                    }
                }
            }
        }.start();
        Thread.sleep(100);
        new Thread() {
            public void run() {
                for(;;) {
                    b = !b;
                    System.out.println("bb:"+b);
                }
            };
        }.start();
    }
}