读写死锁

public class DeadlockRisk {
    private static class Resource {
        public int value;
    }

    private Resource resourceA = new Resource();
    private Resource resourceB = new Resource();

    public int read() {
        synchronized (resourceA) {
            synchronized (resourceB) {
                return resourceB.value + resourceA.value;
            }
        }
    }

    public void write(int a, int b) {
        synchronized (resourceB) {
            synchronized (resourceA) {
                resourceA.value = a;
                resourceB.value = b;
            }
        }
    }
}