如何找到角度的rc版本？

Question

如何找到角度2的RC版本？似乎当我谷歌问题角度2时，似乎有很多语法变化。

它已经稳定了吗？以下是 package.json 。

这是最新的角度2吗？

每个RC之间是否存在很多差异？

由于

public static void main(String[] args) {
    AmazonSNSClient snsClient = new AmazonSNSClient();
    String phoneNumber = "+1XXX5550100";
    String topicArn = createSNSTopic(snsClient);
    subscribeToTopic(snsClient, topicArn, "sms", phoneNumber);
}

public static void subscribeToTopic(AmazonSNSClient snsClient, String topicArn, String protocol, String endpoint) { 
    SubscribeRequest subscribe = new SubscribeRequest(topicArn, protocol, endpoint);
    SubscribeResult subscribeResult = snsClient.subscribe(subscribe);
    System.out.println("Subscribe request: " + 
            snsClient.getCachedResponseMetadata(subscribe));
    System.out.println("Subscribe result: " + subscribeResult);
}