public static void main(String[] args)

throws IOException, ExecutionException, InterruptedException, TimeoutException {

// TODO(developer): Replace these variables before running the sample.

/* project: project ID or project number of the Cloud project your instance belongs to.

zone: name of the zone your instance belongs to.

instanceName: name of the instance your want to stop.

*/

String project = "your-project-id";

String zone = "zone-name";

String instanceName = "instance-name";

stopInstance(project, zone, instanceName);

}

// Stops a started Google Compute Engine instance.

public static void stopInstance(String project, String zone, String instanceName)

throws IOException, ExecutionException, InterruptedException, TimeoutException {

/* Initialize client that will be used to send requests. This client only needs to be created

once, and can be reused for multiple requests. After completing all of your requests, call

the `instancesClient.close()` method on the client to safely

clean up any remaining background resources. */

try (InstancesClient instancesClient = InstancesClient.create()) {

StopInstanceRequest stopInstanceRequest = StopInstanceRequest.newBuilder()

.setProject(project)

.setZone(zone)

.setInstance(instanceName)

.build();

OperationFuture<Operation, Operation> operation = instancesClient.stopAsync(

stopInstanceRequest);

Operation response = operation.get(3, TimeUnit.MINUTES);

if (response.getStatus() == Status.DONE) {

System.out.println("Instance stopped successfully ! ");

}

}

}