### Question:
SpringClientDemo implements ClientDemo { @Override public void declareQueue() throws IOException { RabbitAdmin rabbitAdmin = rabbitAdmin(); try { rabbitAdmin.declareQueue(new Queue("demo2",false,false,false)); }catch (Exception e){ try { if (406 == ((AMQImpl.Channel.Close) ((ShutdownSignalException)e.getCause().getCause()).getReason()).getReplyCode()) { rabbitAdmin.deleteQueue("demo2"); declareQueue(); } }catch (Exception e1){ } log.error("e 's value : {}", e); } }  CachingConnectionFactory cachingConnectionFactory(); RabbitAdmin rabbitAdmin(); @Override void declareQueue(); static void main(String[] args);  }### Answer:
@Test void declareQueue() throws IOException { SpringClientDemo clientDemo = new SpringClientDemo(); clientDemo.declareQueue(); }