获取 EC2 实例 Java API 的状态

我正在尝试在 AWS 上自动化一些东西，并且我正在使用 Java API 来执行此操作。我能够启动我想要的实例数量，但我无法找到正确的类或方法来获取实例的当前状态（如运行、停止等）。

我试过这个

DescribeInstanceStatusRequest describeInstance = new DescribeInstanceStatusRequest().withInstanceIds(instances.get(i).getInstanceId()); DescribeInstanceStatusResult attr = ec2.describeInstanceStatus(describeInstance); List<InstanceStatus> state = attr.getInstanceStatuses();

不确定为什么实例状态是列表

有人可以指出我正确的 API 调用吗？

提前致谢

我想到了这个问题。工作代码

DescribeInstanceStatusRequest describeInstanceRequest = new DescribeInstanceStatusRequest().withInstanceIds(i-xxxxxxxx);
DescribeInstanceStatusResult describeInstanceResult = ec2.describeInstanceStatus(describeInstanceRequest);
List<InstanceStatus> state = describeInstanceResult.getInstanceStatuses();
while (state.size() < 1) { 
    // Do nothing, just wait, have thread sleep if needed
    describeInstanceResult = ec2.describeInstanceStatus(describeInstanceRequest);
    state = describeInstanceResult.getInstanceStatuses();
}
String status = state.get(0).getInstanceState().getName();