### Question:
ServiceException extends RuntimeException { public Integer getCode() { return this.code; } ServiceException();  ServiceException(Status status);  ServiceException(Integer code,String message);  ServiceException(String message); Integer getCode(); void setCode(Integer code);  }### Answer:
@Test public void getCodeTest(){ ServiceException serviceException = new ServiceException(); Assert.assertNull(serviceException.getCode()); serviceException = new ServiceException(Status.ALERT_GROUP_EXIST); Assert.assertNotNull(serviceException.getCode()); serviceException = new ServiceException(10012, "alarm group already exists"); Assert.assertNotNull(serviceException.getCode()); }